linking turntable to fl isnt what you should be looking for, you need to link turntable to line in/mic jack....
The output on a turntable is low level output, Im not sure but with a phono to jackplug adapter you might be able to go straight into the mic socket on the soundcard and then use an audio program like soundforge to record from the mic jack. If this doesnt work due to the low output of a turntable, you need a mixer/pre amp to boost the phono output and then have that go to the line in on the soundcard, I think the first option should work though.
Oh just noticed its a usb turntable, disregard everything I said. lol
Never had a usb turntable i cant help there.
Ok I just went to Numark website......
http://www.numark.com/ttusb
On that page is documentation, I see the turntable came with its own software to convert vinyl to mp3, why dont you just use that, follow the quickstart guide and away you go.