changes in standard form FNDRSUN.fmb

Dear all,
I add my some code behind the button of view output in standard FNDRSUN.fmb form, I complie it and was working fine. After few days we bounce
the application and realize that xml report are not opening. I take original form and compile it, after bouncing it start working fine.
But when we did the same exercise in production, Problem still persist

Please need your solid assistant.


Thanks