Hi rphillips,
Which VWG version you have downloaded?
If you work with net2.0 try to search in your web.config "3.0.5701.0" and replace it with "2.0.5701.0"
If you work with net3.5 try to search in your web.config "2.0.5701.0" and replace it with "3.0.5701.0"
Also I recommend that you remove all VWG references and clean your solution (make sure there are no VWG DLL left in the bin) and then re-add them