TransportException in applet

[prem kanna]

hi all,
i had developed an applet. This applet having one frame class. This applet is called inside a jsp page.The Process of this page is copying files from one folder to another folder in server. Actually this process is working fine in first time. but the problem is i am closing the Applet window not closing the browser. if i reload that applet means the applet is loading but when i am copying a file from SAMBA server then it throw an Exception like:

The Exception is====> jcifs.smb.SmbException:
jcifs.util.transport.TransportException: Transport1[0.0.0.0<00>/172.16.2.1:445]
timedout waiting for response to Trans2QueryPathInformation[command=SMB_COM_TRANSACTION2,received=false,
errorCode=0,flags=0x0018,flags2=0xC003,signSeq=0,tid=1,pid=7121,uid=100,mid=224,
wordCount=15,byteCount=103,totalParameterCount=102,totalDataCount=0,maxParameterCount=2,
maxDataCount=40,maxSetupCount=0,flags=0x00,timeout=0,parameterCount=102,parameterOffset=66,
parameterDisplacement=0,dataCount=0,dataOffset=168,dataDisplacement=0,setupCount=1,pad=1,pad1=0,
informationLevel=0x101,filename=\TEST_AUG18-9780123699999\Latex-P369999\Ch 01-v4]
at jcifs.smb.SmbTransport.send(SmbTransport.java:589)

my code is :

String sourceurl="smb://" + serverusername+":" + serverpassword+"@" + serverip + "/" + filename ;
//source file path in samba server 
String destinationurl="smb://" + serverusername+":" + serverpassword + "@" + serverip + "/" + servernewfolder  + "/" + filename;
// copy file to already available folder 
SmbFileInputStream in = new SmbFileInputStream(sourceurl);
SmbFileOutputStream out = new SmbFileOutputStream(destinationurl);
 if((in != null) && (out != null)) 
 {
System.out.println("file copy");
out = new SmbFileOutputStream(destinationurl);
byte[] buf1 = new byte[1024];
   int len1;            
   while((len1 = in.read(buf1)) > 0)
   {
   out.write(buf1, 0, len1);
   }
in.close();
in = null;
out.close();
out.flush();
out = null;
 }
 

can any one solve my problem please..................

[ UD: Added line break to preserve layout and CODE tags. Please do that in the future whenever you post code. ]
[ September 13, 2008: Message edited by: Ulf Dittmer ]