your gna have to get in about it. Infact sorry to contradict here fellows, but you should loosen off the cable inside to as loose as it will go then remove the wheels and calipers, clean up your pads and caliper carriers. Then using a screwdriver long ways unwind the caliper piston until there is a bit of resistance in turning the disk when the caliper is in place. Then once you have done this adjust the cable up inside the car. This is the proper procedure for adjusting a handbrake. If this doesnt work then you need a couple of handbrake cables matey.