Visual Studio Web Test - Toolbar add-ons is not loaded

I was trying to record some web test via Internet explorer 8 and the problem was that the plugin is not loaded. the problem was that "Microsoft Web Test Recorder Helper" was disable.

so to fix this , go to TOOLS -> Manage Add-ons and Enable the "Microsoft Web Test Recorder Helper" and try to restart IE.

for more infomation you can visit
Diagnosing and fixing Web Test recorder bar issues.