Service tax online filing st3 problem

Use Google Chrome browser. 

Make sure that you filled in all particulars, otherwise it won't allow you to go further

Enable macros, then your problem will solved. if you not found macros page. close the file & again open ST3 file, it will ask macros option.

If you are filling offline utility (Excel) enable the macros and if you are filling online use google chrome

I am also facing the same error code 500, but the error comes when i am checking my already filed ST3 (having status of FILED successfully) under the option of view original ST3 after clicking on the filled return.. 
Even I am using the Chrome... 

Pleas any body having the solution.. 

Also, the error is coming in the view of currently (successfully) filed return only, i can view other old returns (no such error there)