I noticed lately a noise when i brake..i have new front brakes installed in april of 2004..i think my rotors are a bit out of wack..to make a long story short i went out this morning found a large nail in my tire so i took the 4 nuts off and tried to get the wheel off..it won't come off...am i missing a step in this procedure..?..they banged the wheel with rubber hammer,97 protege se..by the way this will be the third set of rotors i put on this..thanks samantha