as above thats why i asked!!!

the cossie rear calipers will be your problem!

undo the caliper and hold it on the disc get some one to pump the pedal while u hold the caliper with the bleed nipple at its highest point!

this is the only way to get the air out!!!!

once u have bled it nip up the bleed nipple and remount the caliper
do the same at other side and try it should be better