I have a vb dll that has been using for years in some asp applications. Recently I am developing a asp.net application that need to use same vb dll. I did exactly the steps author listed in early binding section to call a vb dll from asp.net page writen in C#. I got Server Error "The specified module could not be found" when running on the localhost, and I got different server error:"System.UnauthorizedAccessException: Access is denied." after I deployed it to the test server. I did permission check everything seems in position. Any suggestion? Thanks.