Error adding Microsoft ADO 2.8 reference

Hi

I'm trying to reference ADOX in my website using VWD express 2010.

I click on add reference, click on the COM tab and select 'Microsoft ADO Ext. 2.8 for DDL and Security', click ok and get a message :-

A reference to 'Microsoft ADO Ext. 2.8 for DDL and Security' could not be added. Converting the type library to a .NET assembly failed. No process is associated with this object.

Can anyone shine some light in this for me? It seems to happen for all COM components.

Cheers Guys..