I am using ASP .NET (VB) to try and authenticate using oAuth. I have been able to get a request token and direct a user to Twitter's authentication page. Twitter then redirects back to my app. At that point I attempt to get an access token, but I continue to receive 401 "unauthorized" errors. I have made sure that I am getting a new signature, using both the token and token secret when generating the signature, and that my url parameters are in alphabetical order, but I continue to get 401 errors. Has anyone experienced this, and if so, could you point me in the right direction toward diagnosing this issue?
-Matt
