HELP, can't delete Time Machine back-ups from trash

Alright, here's the situation. I have a 1TB external set up with 250gigs partitioned for backing up with time machine, and the rest just for storing files. My time machine partition was full so i decided to move the 5 oldest backups to the trash to make some more room. But when i went to delete trash it counted up to a couple million files and just sat there saying preparing to delete. It was never able to actually start deleting the files, it was just preparing to delete for a couple hours.

I also tried moving them back onto my harddrive but it says that i don't have enough room, which i do. so these 5 back ups are just stuck in my trash folder and i can't figure out a way to get rid of them.

So the main question is how do i delete my trash with the time machine back ups in it?

 

Thanks, that did the trick. It took a couple hours, but it worked.