Application library dependencies belong in WEB-INF/lib. If you start putting them in the startWeblogic file, you can cause problems with other applications or Weblogic itself as they may depend on different versions of that particular library.
It sounds like you have a problem with your .WAR or .EAR. Have you tried expanding the application file in an empty directory to see if everything is where it should be? You can also open .WAR's and .EAR's with
Winzip if you are more comfortable with a graphical environment.
Exactly what didn't work? Compiling? Deploying? Run-time errors?
