Hi Vinayak,
did you check heck the note I mentioned in my earlier respons? It contains links to a number of other notes that might be helpful.
You should also check if the logon settings in the SICF service for the web GUI in ECC contain any special settings. There could also be some parameters that control the rendering.
Maybe also check the documents "Almost everything about transaction launcher" by Hasan Zubairi. They might contain some helpful information on how to identify the root cause of the issue.
Christian