Problemet med SqlClientPermission

Når jeg forsøger at connecte til min ms sql server får jeg denne fejl meddelelse. Er der en som ved hvad fejlen er?

Jeg connecter med denne kode:
        Try
            MyConnection = New SqlConnection("server=localhost;database=Intranet;uid=sa;pwd=xxxxx")
            MyCommand = New SqlCommand("select * from Sale", MyConnection)
            MyConnection.Open()
        Catch ex As Exception
            myLabel.Text = ex.ToString
        End Try


Jeg får denne fejl returneret:

System.Security.SecurityException: Request for the permission of type System.Data.SqlClient.SqlClientPermission, System.Data, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 failed. at System.Security.CodeAccessSecurityEngine.CheckHelper(PermissionSet grantedSet, PermissionSet deniedSet, CodeAccessPermission demand, PermissionToken permToken) at System.Security.CodeAccessSecurityEngine.Check(PermissionToken permToken, CodeAccessPermission demand, StackCrawlMark& stackMark, Int32 checkFrames, Int32 unrestrictedOverride) at System.Security.CodeAccessSecurityEngine.Check(CodeAccessPermission cap, StackCrawlMark& stackMark) at System.Security.CodeAccessPermission.Demand() at System.Data.SqlClient.SqlConnectionString.Demand(SqlConnectionString constr) at System.Data.SqlClient.SqlConnection.Open() at Kunder.Kunder.RenderWebPart(HtmlTextWriter output)