I recently installed Autocad 2007 on windows 7 64 bits and I can only print only 1 copy each time. I cannot print more copies or use the publish command (it doesn't print anything). i have 2 printers and it's the same with each one of them. Can anybody know what the problem is?

You do realize you are using a 32-bit program on a 64-bit system and that it is five years out of date?  What were you expecting?What printer are you using?  How old is the printer?  Did you try uninstalling the printer then reinstalling?  Have you checked for updated drivers?