Coded Ui Test - System.NullReferenceException

Hello,

I've ui test which are working fine in visual studio test runner and not in Resharper test runner.
the following exception was thrown : System.NullReferenceException when i tried to access or set the Text property of an Microsoft.VisualStudio.TestTools.UITesting.HtmlControls.HtmlEdit control.
Any idea?

(Resharper 6.1.1000.82 - VS2010 Premium)

Thanks in advance.
Regards,
Paul