java.lang.ClassCastException:java.lang.NoClassDefFoundError

[udhaya]

hi to all,

     I am using birt (runtime)  in my application it is very nice to  produce report and export into PDF etc., it is working fine in my local machine. But the same time i upload the birt (runtime) to Server it rise the error.
  " java.lang.ClassCastException:java.lang.NoClassDefFoundError " . it have any other configuration specifically
for Server.  Any Help.

thanks in Advance

regards
udhaya kumar p.s