Vista - wireless network printer offline

I have a wireless network printer connected (via wireless) to our new Vista
laptop computer. Everything works fine when the print drivers are first
installed. However, after the computer goes into sleep mode, the printer
status shows up as “offline�. After reading some posts here, I have even
tried a complete reboot of the system, but that does not work. The only
solution seems to be to re-install the printer every day when we return to
the office – and not let the printer go into sleep mode.

Is there some set up or security feature I am missing? Any way to force
this back online? Even with a network refresh, it does not seem to see the
wireless printer anymore. I am using a Dell wireless printer server 3300,
and a Dell printer. Linksys wireless router and Vista on a loptop.

The wireless printer works perfectly on my XP laptop, everytime, but not on
Vista.

Thanks in advance for your help!