Did you do the proper break-in for your brakes?
Theres a thread running around here somewhere, but it explains exactly what you should do. I just had my rotors and pads (Hawk as well) done, no squeak at all after doing some 'braking in'.
Did you check your rotors to see if they needed replacing? Some folks can get by with 2-3 pad replacements per rotor, I just replaced my stock pads and rotors at 51k (surprised they lasted that long). The rotors were just as bad off as the pads. (I guess I'm an aggressive braker..)
Good luck!