Unable to execute executable jar file

[Amit Kr Kumar]

Hi Team
I am facing a very unusual problem. I have created an executable server jar file. I am able to run it using the java -jar server.jar from the same directory where server.jar file is lying.
However when i go to any other directory from prompt and execute java -jar server.jar it says :

Exception in thread "main" java.util.zip.ZipException: The system cannot find the file specified
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:110)
at java.util.jar.JarFile.<init>(JarFile.java:115)
at java.util.jar.JarFile.<init>(JarFile.java:57)
I have set the classpath as well in the prompt
using the command
set CLASSPATH=%CLASSPATH%;c:\server\server.jar;
Pls Help
Amit

[Amit Kr Kumar]

Anybody Please Help
Amit