line in (2-BEHRINGER USB WDM A

Hello.

I am using guitar link and I want to use audacity during recording due to its simplicity but powerful and user friendly.
However, I have set the line in (2-BEHRINGER USB WDM A as recording device in sounds manager at control panel. Also I selected this as recording device in audacity.
But whenever I tried to record, error message says "error while opening sound device. please check the recording device and project sample rate.

I am using windows 8.

http://manual.audacityteam.org/o/man/faq_errors.html#sound_device

Koz