You have to make sure the e-brake is down/disengaged before you get to the rear pads also. Just in case you aren't aware.

As for adjusting the e-brake, on at least some cars they suggest you loosen the e-brake cable first, then pump the brakes up (after pad change) and then after the pedal is firm (or as firm as normal) to adjust the e-brake so it drags slightly at 1 or 2 clicks.