PI Admin

I have just created a new PI server (3.4.375.79) and had no issues during the install. However when I try to create or view a point, either via Datalink or the SMT I get the following error

Error -2147220415. Unable to fetch class names.

CallStack:
ImportDialog:FillPointClassComboByServer
ImportDialog:UserFormActivate

Any help would be great.

Thanks

Barryh