Can not run Tmacat on Win2k

When i run tomcat on windows by command prompt the following eceptions occur.
I have set the JAVA_HOME and CATALINA_HOME paths correctly.
my jdk is jdk1.3. The tomcat 4.0.6 requires jdk1.2.x or above.

Starting service Tomcat-Standalone
Apache Tomcat/4.0.6
PARSE error at line 1 column 1 of D:\Apache Tomcat 4.0\conf\tomcat-users.xml
org.xml.sax.SAXParseException: The root element is required in a well-formed doc
ument.
Catalina.start: LifecycleException: memoryRealm.readXml: org.xml.sax.SAXParseE
xception: The root element is required in a well-formed document.
LifecycleException: memoryRealm.readXml: org.xml.sax.SAXParseException: The ro
ot element is required in a well-formed document.
at org.apache.catalina.realm.MemoryRealm.start(MemoryRealm.java:335)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1108)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:343
)
at org.apache.catalina.core.StandardService.start(StandardService.java:3
88)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:506
)
at org.apache.catalina.startup.Catalina.start(Catalina.java:781)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
at org.apache.catalina.startup.Catalina.process(Catalina.java:179)
at java.lang.reflect.Method.invoke(Native Method)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)
----- Root Cause -----
org.xml.sax.SAXParseException: The root element is required in a well-formed doc
ument.
at org.apache.xerces.framework.XMLParser.reportError(XMLParser.java:1213
)
at org.apache.xerces.framework.XMLDocumentScanner.reportFatalXMLError(XM
LDocumentScanner.java:570)
at org.apache.xerces.framework.XMLDocumentScanner$XMLDeclDispatcher.endO
fInput(XMLDocumentScanner.java:790)
at org.apache.xerces.framework.XMLDocumentScanner.endOfInput(XMLDocument
Scanner.java:418)
at org.apache.xerces.validators.common.XMLValidator.sendEndOfInputNotifi
cations(XMLValidator.java:712)
at org.apache.xerces.readers.DefaultEntityHandler.changeReaders(DefaultE
ntityHandler.java:1031)
at org.apache.xerces.readers.XMLEntityReader.changeReaders(XMLEntityRead
er.java:168)
at org.apache.xerces.readers.UTF8Reader.changeReaders(UTF8Reader.java:18
2)
at org.apache.xerces.readers.UTF8Reader.lookingAtChar(UTF8Reader.java:19
7)
at org.apache.xerces.framework.XMLDocumentScanner$XMLDeclDispatcher.disp
atch(XMLDocumentScanner.java:686)
at org.apache.xerces.framework.XMLDocumentScanner.parseSome(XMLDocumentS
canner.java:381)
at org.apache.xerces.framework.XMLParser.parse(XMLParser.java:1098)
at org.xml.sax.helpers.XMLReaderAdapter.parse(XMLReaderAdapter.java:223)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:362)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:301)
at org.apache.catalina.util.xml.XmlMapper.readXml(XmlMapper.java:228)
at org.apache.catalina.realm.MemoryRealm.start(MemoryRealm.java:333)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1108)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:343
)
at org.apache.catalina.core.StandardService.start(StandardService.java:3
88)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:506
)
at org.apache.catalina.startup.Catalina.start(Catalina.java:781)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
at org.apache.catalina.startup.Catalina.process(Catalina.java:179)
at java.lang.reflect.Method.invoke(Native Method)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)

Kindly tell me the solution.

Looks like the xml document is not well-formed.
<element_name />
D:\Apache Tomcat 4.0\conf\tomcat-users.xml
Here is mine, which has been untouched.
<tomcat-users>
<user name="tomcat" password="tomcat" roles="tomcat" />
<user name="role1" password="tomcat" roles="role1" />
<user name="both" password="tomcat" roles="tomcat,role1" />
</tomcat-users>
http://www.apl.jhu.edu/~hall/java/Servlet-Tutorial/
has a decent set of instructions for Tomcat.

Thanks for your suggestion. My tomcat_users.xml file was blank. I added your codes to it. BUt now i m getting another set of error about port 8080 already in use.

Catalina.start: LifecycleException: null.open: java.net.BindException: Address
in use: JVM_Bind:8080
LifecycleException: null.open: java.net.BindException: Address in use: JVM_Bin
d:8080
at org.apache.catalina.connector.http.HttpConnector.initialize(HttpConne
ctor.java:1130)
at org.apache.catalina.core.StandardService.initialize(StandardService.j
ava:454)
at org.apache.catalina.core.StandardServer.initialize(StandardServer.jav
a:553)
at org.apache.catalina.startup.Catalina.start(Catalina.java:780)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
at org.apache.catalina.startup.Catalina.process(Catalina.java:179)
at java.lang.reflect.Method.invoke(Native Method)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)
----- Root Cause -----
java.net.BindException: Address in use: JVM_Bind:8080
at org.apache.catalina.connector.http.HttpConnector.open(HttpConnector.j
ava:950)
at org.apache.catalina.connector.http.HttpConnector.initialize(HttpConne
ctor.java:1128)
at org.apache.catalina.core.StandardService.initialize(StandardService.j
ava:454)
at org.apache.catalina.core.StandardServer.initialize(StandardServer.jav
a:553)
at org.apache.catalina.startup.Catalina.start(Catalina.java:780)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
at org.apache.catalina.startup.Catalina.process(Catalina.java:179)
at java.lang.reflect.Method.invoke(Native Method)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)

Then i changed the port to 1977 and now i am getting these errors
Catalina.start: LifecycleException: Error creating server socket (java.net.Bind
Exception): java.net.BindException: Address in use: JVM_Bind
LifecycleException: Error creating server socket (java.net.BindException): jav
a.net.BindException: Address in use: JVM_Bind
at org.apache.catalina.connector.warp.WarpConnector.initialize(WarpConne
ctor.java:491)
at org.apache.catalina.core.StandardService.initialize(StandardService.j
ava:454)
at org.apache.catalina.core.StandardServer.initialize(StandardServer.jav
a:553)
at org.apache.catalina.startup.Catalina.start(Catalina.java:780)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
at org.apache.catalina.startup.Catalina.process(Catalina.java:179)
at java.lang.reflect.Method.invoke(Native Method)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)
----- Root Cause -----
java.net.BindException: Address in use: JVM_Bind
at java.net.PlainSocketImpl.socketBind(Native Method)
at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:397)
at java.net.ServerSocket.<init>(ServerSocket.java:170)
at java.net.ServerSocket.<init>(ServerSocket.java:121)
at org.apache.catalina.net.DefaultServerSocketFactory.createSocket(Defau
ltServerSocketFactory.java:118)
at org.apache.catalina.connector.warp.WarpConnector.initialize(WarpConne
ctor.java:485)
at org.apache.catalina.core.StandardService.initialize(StandardService.j
ava:454)
at org.apache.catalina.core.StandardServer.initialize(StandardServer.jav
a:553)
at org.apache.catalina.startup.Catalina.start(Catalina.java:780)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
at org.apache.catalina.startup.Catalina.process(Catalina.java:179)
at java.lang.reflect.Method.invoke(Native Method)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)
What is the problem

Richa

If those ports are already in use you probably have instances of Tomcat already running. Did you install as a service? What do you see when you look at the running processes?
Bill