Honda Repair: Rear brakes, caliper piston, rear caliper

Question
I have a 97 honda accord EX my rear brakes were needing replace. I bought new pads and pulled the old one off and went I to compress the calapper and I wasn't able to do it as a have in the past on other cars. Is there a trick to getting it compressed? The calapper doesn't seem stuck it seems to move but it won't compress.

Answer
Hope you didn't mess anything up.  Sorry it took so long to reply but the rear caliper piston doesn't push in, it turns in.  Just use a large screwdriver and turn it closewise.  Make sure you have the groves lined straight up and down.  There is a nipple on the brake pad that must line up with the groove in the caliper.