rear caliper won't come off disk

[RELAYER@aol.com]

Hey fellow Q men,

 I've having trouble with my Coupe Q's rear brake pad replacement.
I cant get the caliper and pads off of the disk once I've undone the 2 allen
screws that hold the caliper to the hub.  I've got a small lip on the outer
edge of my disk and can't slide the pads off past it......and there's no
place to use a C clamp to expand it.  Let me know if anyone has any ideas or
solutions to  get the caliper and pads off the disk....
Thanks

Christian Long
1990 90
1990 Coupe Q