Aamir,
I think your Support Automation URL should be http://sdsc:8090/SupportAutomation in the above SDM options.
Do you have some URL Rewrite module on IIS that's running? Normally the browser should have done something like this:
GET /CAisd/pdmweb.exe?SID=305332997+FID=7170+URL=http%3A%2F%2FSDMServerName%3A8070%2FSupportAutomation%2Fjsp%2FassistanceSession%2FforceLogin.jsp%3FBOPSID%3D%25bopsid%26queueID%3D1%26roleID%3D10005%26routeID%3D402111%26lID%3D1+OP=LINK_WITH_BOPSID+KEEP.IsPopUp=1+KEEP.POPUP_NAME=+popupType=1 HTTP/1.1
But in your case its doing below (notice its missing pdmweb.exe?SID=xxxxxxx+FID=***+URL= )
Thx
_R