CUBASE AI 7 NO SOUND

Hi, I recently installed Cubase AI 7 on my laptop. I have also plugged in my UR 22 USB Audio Interface. The first few times i used Cubase it worked fine. I plugged my headphones into my interface and I could hear my audio in my headphones. Now when i try to use it, my project in Cubase plays out of my laptop. However it is ONLY my Cubase projects doing this as everything else plays through my headphones (plugged into my interface). I have not changed any settings so I’m not sure whats going on but i really need help please!!! :angry: :angry: :angry: