Discs and hubs. How do you get the ruddy things apart ?!?!

Hi.
I'm doing the rear brakes on my '96 disco and have a problem. I've got the disc and hubs off the axle but I can't get the old disc off the hub. ( yes I have undone the bolts !). They seem to be seazed up, I cand get them to move at all. Any ideas lads ? Any help would be great as I have to use it for work on Monday !!!
Mudynaty.

Put the wheel back on to it and put a bar through and hit it hard. If the disk splits in 2 like one of mine did then take it off and prise it off. Can take a few hours to do but will move in the end. Dont be a tight git and put copper grease on for next time! Or the next person to do it will also have the same trouble. (not saying it was you who did it last but the person was tight not to spare 3p of grease!)

Thanks mate that worked a treat. Not sure my neighbours like me any more though, there goes there Sunday morning lie in !!!!!! Ha ha