Hello Vijay,
An empty form usually indicates that there is a syntax error in the form definition. I suggest you compare the failing customised form with the out-of-box r17 form (from bopcfg\www\htmpl\web) using a visual file difference tool and re-apply the mods one at a time to the unmodified r17 form, testing the form after applying each mod.
Regards,
James
PS: if it still doesn't work, post the form source to this thread and I'm sure someone will help out.