Do a clean boot of Windows. See
http://support.microsoft.com/default.aspx?scid=kb;en-us;232018
Try removing the drivers.
Download the printer driver.
http://downloads.lexmark.com/cgi-perl/downloads.cgi?ccs=229:1:0:389:0:0&emeafram
e=&fileID=472
Install the new drivers following the instructions and on-screen prompts.
Let us know.

Signature
Tom
MSMVP PS-D
> I Installed a Lexmark Z605 and it will not print because
> of communication errors. Tried to uninstall to reinstall
[quoted text clipped - 3 lines]
>
> Thanks