I am having trouble with my reartires. while i have been doing the cylinder head over the past few weeks i had the parkingbreak on. today i took it off but now my car wont move. granted the tranny is out but it still moved backwards before. i cant even push it. i lifted the rear of the car and tried to spin the tires but the passenger side only moves a little and the driver side dosent move at all. whats the problem? is my brakes sticking?

thanks in advance.