Page Builder error! in "PDF" form

Hi Experts,
I'm actually using the LOAD RUNNER to test the performance of the portal application, we have a pdf application for "leave Request" when I try to open that application in "normal recording mode(HTTP/HTML)" it is not opening.

Then I recorded it in the "earlier version of recording engine", it is recorded succesfully and the PDF form is also opened.

But while replaying the script the warning message saying "Warning -26612: HTTP Status-Code=500 (Internal Server Error) " for particular server" is coming.

In the script the page builder code for webdynpro is available. This is for opening and loading the PDF form. In that particular line only the warning message is displayed. If I replay the script there is "No errors detected". But this type of warning is coming. Also it is not creating the leave request while replying(Leave request is not created).

I think because of the warning, the application is not able to acheive its funtionality while replaying my test.

Please guide me to resolve this issue.

Thanking in Advance.
Regards,
Krishnamurty.k