Access error when adding web reference to vs2010

Hi,

I am new to both web references and VS2010.  I inherited a project that involves adding WSDL based web references to a C# class library project in VS2010.  When adding a web reference I get the following error:

"Access to the path blah/blah/blah is denied"

I can see the wsdl and schema files in the browser window but the "add reference" button is greyed-out.  I cannot reference any of dozens of wsdls so, I don't think it's a wsdl issue.  BTW I am working from an account with administrator privileges.  Seems like a security setting problem but, I'm clueless as to where to start. 

Thanks much in advance for help.