Something I found that was that you need to have an account setup in the client settings editor (try entering the system account into the client settings editor) before you can get into the licensing utility.
The same error is occurring on 5.1 and Im sending the image just you check if you have the same problem. A Java error java.lang.NoClassDefFoundError and this is not showing on screen , only if you run through cmd (DOS). Anybody have any idea or have the fix to that? Thanks, Rubem