Problem while Deploying EJBs

I am facing problem while deploying EJBs:
When I am trying deploy EJBs on solaris machine having Websphere Commerce Suite(WCS) 5.1, I am getting following error:
[03.05.05 13:27:27:798 EDT] eca99a EJBConfig X XMLC0007E: Failed to
create /Deploy : jarFileXMLC0043E: Remote Exception java.rmi.ServerException: RemoteException occurred in server thread;
nested exception is:
java.rmi.RemoteException: ; nested exception is:
java.rmi.RemoteException: ; nested exception is:
java.util.zip.ZipException: error in opening the zip file
/wcs/asc/deployedEJBs/EJBDeployed.jar
[03.05.05 13:27:27:802 EDT] eca99a EJBConfig X XMLC0007E: Failed to create EJB : CatEntShip
Ending Child Processing. Exception: java.lang.NullPointerException
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But I am able to deploy EJBs on WIndows 2000 using same jar file.
I am transferring jar files to solaris machine using SmartFTP tool.Whether this causes any problem?

Any help would be appreciated.

just a guess, but maybe you are transfering the files to the solaris in acsii mode. make sure you transfer all jar's and zip files in binary mode.
HTH
brat