set up problems!!

Hey guys! can anyone help??? been struggling with this for hours! I've installed all my software, finally managed to get my DK2 to work but only with the demo scene on the config window. As soon as I quit the demo scene...the light on headset goes from blue yellow and thats it... I lose all video input to the headset. If I go into the display settings and click "extent to desktop" I get video again.. but the screen in the oculus splits and turns sideways.. Have tried everything I can think of and having absolutely no luck!! So frustrated!! Can anyone help me?? Regards, j