IC Webclient blank screen

We have installed CRM 4.0 with J2EE 6.20 along with all the required Java components and ICSERVER. The RFC destinations work without any problems. But when we start the CRM_IC application only a blank white screen is displayed in the browser.

In MS Internet Explorer, we get a Javascript error and other than this there is no error in any logs. Digging into the service market place, we found some notes and applied them too. Has anyone faced such problem and can provide the solution?

thanks

Prakash