Certificate Authority:Unable to Enroll Client PC with CA

Hi

I have setup a microsoft CA on a server which is also acting as my Radius Server.I am trying to enroll Windows XP client with CA to fetch client cerificates which will be used for Dot1x EAP-TLS authentication.But I am unable to do so.When I try submitting the certificate request form i get following error in browser of client

Error

Your request failed. An error occurred while the server was processing your request.

Contact your administrator for further assistance.



Request Mode
newreq - New Request
Disposition
FFFFFFFF - (unknown)
Disposition message
(none)
Result
The binding handle is invalid. 0x800706a6 (WIN32: 1702)
COM Error Info
CCertRequest::Submit The binding handle is invalid. 0x800706a6 (WIN32: 1702)
LastStatus
The operation completed successfully. 0x0 (0)
Suggested Cause
No suggestions.


Any suggestions on this problem

Regards
Niles,