Web Dynpro configuration : HTTP 500 Internal Server Error

Hi Expert,

   I have done configuration of SAP system for Web Dynpro.When I execute this web Dynpro it gives error HTTP 500 internal server error if I have gone through SAP Gui. If I login into System through Web Browser it working fine and it gives output.

What I should do for such error?

    Thanks in advance...........!!!

Regards,

Parag.