orrrrrrr---loosen all the lugnuts-----not way loose---just so they arent tight. then,back up,and slam on the brakes HARD. DO THIS A FEW TIMES--BACK AND FORTH. normally will break the drum loose--and if you only back the nuts of a mite--wont hurt rim or nut--ir you take the rim off--and spray some penetrant around the hub to drum contact--and then do the above--it should break free--then you still may have to do what the others said,and back off the adjuster--