TestExecute can NOT launch IExplorer

Hi  all,

Does anyone execute the tests by using IExplorer and TestExecute (11.10.1005.11)? I just wrote one command for testing.

  Browsers.Item(btChrome).Run("http://smartbear.com"); //OK (Chrome 45)

  Browsers.Item(btFirefox).Run("http://smartbear.com"); //OK (firefox 40)

  Browsers.Item(btIExplorer).Run("http://smartbear.com"); //failed (IE 11)

Does anyone know why it happens? 

Regards,

Jie