I found a theory to fix this:
1) Turn your ps3 off.
2) Pick Ps3 Up (make sure to unplug it other wise this wont work)
3) Open Window
4) Scream out loud "I NEED TO GO PAY FOR A NEW COPY OF MW2 SO I CAN BE A USB MODDER LIKE ALL THE REST OF THE LEECHERS!"
I hope this helps you out