将COM组件引用添加到VB.NET项目时出现问题

I have a third party COM dll that I'm trying to add to a vb.net (2008 express) project. I put the dll in C:\WINDOWS\system32\ and registered it with "regsvr32 vxncom.dll". When I go to projects > add reference and go to the COM tab it shows up in the list of available components/libraries. But, when I select the library and hit ok, visual studio complains: "A reference to 'vxncom 4.0 Library' could not be added. Could not register the ActiveX type library 'C:\WINDOWS\system32\vxncom.dll'."I have a third party COM dll that I'm trying to