can't hear playback after purchasing USB audio license

[musicisblack]

Also I have just tried, downloading a loop pack (one of the free ones) to see if I could playback a loop in a project. Strangely enough, I could hear the samples while in the loop browser through my cellphone's loudspeaker (all along i have not disconnected the sound card) and once imported to the project I would hit play and I could see the loop being played but nothing sounding through my phone or through the headphones I have connected to the soundcard.