Lexmark Z515 printer driver issue

I have tried to install the Vista driver for my Lexmark z515 printer. I get the error message, not a valid win32 application. Whenever I start my computer, a message pops up that windows needs to install a driver for the Lexmark z515 and it says that it successfully installs, yet the printer does not show up in my printers and if I try to print a document, it says that I need to install a printer. Every time that I restart my PC, it goes through the same thing, windows must install driver, driver successfully downloaded, yet no printer showing...