FastCGI Error

[roadwarrior]

Im using OneAdmin from Covdem, I already set it up but every time I try to login to the administrator page I get this error:

"FastCGI Error

The FastCGI Handler was unable to process the request. Error Details:

• The FastCGI process exited unexpectedly
• Error Number: -2147467259 (0x80004005).
• Error Description: Unspecified error

HTTP Error 500 - Server Error.
Internet Information Services (IIS)

"

Any help?