I'm at work atm so I hope I remembered the details correctly.
I don't know how to select an output separately. I'm assuming I've got the wrong output selected but I can only seem to find 'input/output' in the audio settings tab. This applies to everything in FL, but I can still hear outside of FL (checked with YouTube). When I select the fast track as an input in the mixer I can see that FL studio detects sound coming in as I can see the wave vibrate (just tapping the end of 1/4 inch jack), but I can't hear anything in FL studio. After installing the correct drivers I selected the fast track ASIO as my primary audio. I recently bought an M-audio fast track pro interface off eBay.