ExecutionException while deploying JAR file in AServer

[Mey Mey]

I successfully deployed and executed the stateless bean eg. HelloBean comming along with websphere, but when i do my own bean I am getting error during deployment thro' admin console, I am getting ExecutionException while deploying, can any body help me out in this regard.
This is the exception
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com.ibm.ejs.sm.client.command.ExecutionException: Error during deploying jar file.
at com.ibm.ejs.sm.client.RepositoryOpException.<init>(RepositoryOpException.java:51)
at com.ibm.ejs.sm.client.command.ExecutionException.<init>(ExecutionException.java:63)
at com.ibm.ejs.sm.client.command.DeployJarCommand.execute(DeployJarCommand.java:86)
at com.ibm.ejs.sm.client.command.CommandManager$ExecutionThread.run(CommandManager.java:264)
at com.ibm.ejs.sm.client.command.ThreadPool$PooledThread.run(ThreadPool.java:89)