title: Why won't Visual Studio Tester Edition run my web tests?
body: <p>I created a new test project with web tests as described in Microsoft's documentation <a href="http://msdn.microsoft.com/en-us/library/ms182539%28VS.80%29.aspx" rel="nofollow noreferrer">here.</a> However, when I try to run a web test, even if it's just a blank test, I get the following error:</p>
  <blockquote>
  <p>Request failed: Could not run Web test 'WebTest1' on agent 'MYCOMPUTER': Method not found: 'Void Microsoft.VisualStudio.TestTools.WebTesting.WebTestContext..ctor(System.Collections.Generic.Dictionary`2, Int32, System.String, System.String, Int32, Int32, Microsoft.VisualStudio.TestTools.WebTesting.ValidationLevel)'.</p>
  <p>at Microsoft.VisualStudio.TestTools.WebStress.WebTestCaseContext..ctor(WebTestCaseVariation variation, Int32 webTestIteration, Hashtable runContextParameters)
  at Microsoft.VisualStudio.TestTools.WebStress.WebTestCaseVariation..ctor(WebTestElement webTestElement, Hashtable runContextParameters)
  at Microsoft.VisualStudio.TestTools.WebStress.WebTestElement.CreateVariation(IRunContext runContext)
  at Microsoft.VisualStudio.TestTools.WebStress.WebTestRunner.StartupVariation()
  at Microsoft.VisualStudio.TestTools.WebStress.WebTestRunner.PlaybackThread()</p>
  </blockquote>
  <p>I've seen some similiar posts on other forums where a user corrects the problem by reinstalling VS2008 Service Pack 1,  but I'm having no such luck.</p>
  <p>Has anyone else here encountered this problem.  To repeat, there is no problem with <i>recording</i> web tests, but I get an error when I <i>execute</i> them.</p>