1999 Jeep Wrangler Front disc brakes locked up

I just replaced the front pads and rotors on the Jeep. When I tried to drive it, the front wheels would not turn. The new rotors and pads look identical to the old ones. I have bled the brakes and actually loosened the nuts that attach the calipers to the rotors. This helped a little but the pads are still in constant contact with the rotors. There was no problem when I placed the caliper and pads onto the rotor, there was plenty of clearance then. I have changed pads and rotors on about six vehicles previously and have never seen anything like this. Any ideas?