03 rear dash problem

trying to remove the rear dash of my car but it wont move! i removed the two plastic pieces behind the seats, but the dash tucked underneath the plastic trim by the rear window wont come out, its too long and i already cracked the plastic thing that goes around the seatbelts. if anyone has ANY information on this it would be appreciated. i just got new speakers and not being able to put them in is KILLING ME!