Whenever I post a message, I get the following:

"There has been a serious error loading the forum. No further information is available.
Please contact the administrator if this persists"

It goes on to say:

"Note: If you are the administrator, and need help with this problem, please visit this url:" which points to a Codeplex link.

I can't see any useful instructions there.

However, I only have to click "Try Again" and the message is successfully posted.

Help would be greatly appreciated.