My development environment is MS Visual Studio 2010, using VB.NET. All I need to do is post a Tweet for some of the identified status changes within my web application. I don't need user verification as the app is designed to automatically post the status change Tweet whenever it occurs. I added all 4 required values, ConsumerKey, ConsumerSecret, OAuthToken, and OAuthTokenSecret to the web.config file in the "appSettings" section of the "configuration" section. <appSettings> <!-- Twitter and BitLy access keys --> <add key="ConsumerKey" value="MYCONSUMERKEY" /> <add key="ConsumerSecret" value="MYCONSUMERSECRETKEY" /> <add key="OAuthToken" value="MYAPPSOAUTHTOKENKEY" /> <add key="OAuthTokenSecret" value="MYAPPSOAUTHTOKENSECRETKEY" /> </appSettings> I found that by going to twitter.com and signing into the account that is using the application, then go to the "Settings" page, go to the bottom of the page and click on the "API" menu option. Once the API page appears you will click on the button "2", Register An App. On the right side on the new page, you will see a button "View Your Applications." If you have previously registered your app, click this button, If not fill out the application for a new app. Now at the View your Applications page, select the app you want to get the authorization keys for where is says "Edit Details". Now click on the button to the right that says, "Application Detail." Here you will find your Consumer Key and your Consumer Secret Key. On the right side of this page you will see the menu option "My Access Token", click it and you will find your oauth_token and your oauth_token_secret keys! Now that you have all the keys, put them in the "appSettings" section of the web.config file. I add "Dim twConn As New TwitterVB2.TwitterAPI" at the top of the code behind web page. I then created a subroutine where I pass in the Tweet: Public Sub PostOnTwitter(ByVal Tweet As String) 'Retrieve Keys from web.config Dim twitterKey As String = System.Configuration.ConfigurationManager.AppSettings("ConsumerKey") Dim twitterSecret As String = System.Configuration.ConfigurationManager.AppSettings("ConsumerSecret") Dim twitterOAuthToken As String = System.Configuration.ConfigurationManager.AppSettings("OAuthToken") Dim twitterOAuthTokenSecret As String = System.Configuration.ConfigurationManager.AppSettings("OAuthTokenSecret") Try twConn.AuthenticateWith(twitterKey, twitterSecret, twitterOAuthToken, twitterOAuthTokenSecret) twConn.Update(Trim(Tweet)) Catch ex As Exception lblError.Text = "Twitter Returned: " & ex.Message End Try End Sub This code works great on my local development, an environment that allows "Full" trust level. However it appears when I publish my application to my host, Rackspace.com which uses an environment of "Cloud Hosting" , the Trust Level is less than "Full" and I get an error. "Twitter Returned: Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=126.96.36.199, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed." Can you tell me what I am doing wrong, and what I need to do to fix the problem? Thanks.
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