Problems running jsp files with tags on tomcat 4.0

hi,
i had some jsp1.1 stuff running on tomcat3.3.
last week i moved to tomcat 4.0 , changed the tags to fit jsp1.2 and... everything is wrong now. while trying to run jsp with tags i get an error message (same for all files):
---->
description The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: (class: org/apache/jsp/djsp$jsp, method: _jspService signature: (Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse; )V) Incompatible object argument for function call
<-------
the jsp files with no tags and servlets are running ok.
I NEED YOUR HELP!!!

cyclid,
i have the same environment setup and the same troubles. after searching the forums, it seems that there are others with the same, if not similar issues, yet no solutions. if you find the solution to this one, could you please post it. i would really appreciate it since i have been on this one for several days with no success. i even tried the helloworld jsp/custom tag examples from a jsp profession book that i have and that won't work.
Anyone out there,
if you have any idea why this problem exists, any solutions, ideas would be appreciated.
thank you,
navesink

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