how have you set up the asio driver also?. as there are 2 switches on the front regarding output.. if in sonar they aren't tricked you will have issues, if they aren't ticked and they match. i.e. output 1/2 or output 1/2/3/4
it's a mono input regardless (I have to use both connectors for a stereo midi module)
how have you setup the buttons on the front also? and do you need phantom power for your mic?