SAPGUI for HTML is not working

Hi All,

I had connected to the production server from portal and able to view the transactional Iviews successfully from the portal with SAPGUI for WINDOWS.

Now i want to make these trasactinal ivews <b>web enabled</b> through the portal.So i had I had activated the ITS services WEBGUI and it is working succesfully also.

Now i had changed the SAPGUI for WINDOWS to SAPGUI for HTML. its not working with SAPGUI with HTML. wat could be the reson?

Please help me wat i need to do made SAPGUI for HTML work  from portal?

Please guide me with the procedure..