HELP!!

I have a1998 Jeep wrangler. I just bought new replacement hinges,
but I need to get first get my spare tire off before the hinges can
come oof. But my spare tire is rusted on to the tail gate and I have
not been able to get it off. I have some WD-40 and some other stuff
sprayed on try to get it off. But so far nothing has happened. Does
anyone else now what else to do? And yes, I have taken off the lug
nuts. Thanks

-Chris