Won't see Brother Wireless

I have 3 laptops, one having Vitsa OS while the other 2 XP, all linked
via wireless router (N Band). All 3 linked fine to the interenet.

However the Vista PC will not print via the Brother Wireless while the
two XPs print fine. The Vista machine is Sony and contains Norton 360.
On my printer settings it says the printer is offline.

I have contacted Linksys (router), Brother (printer), Sony (Vista) and
Norton. We have made adjustments and run tests to link the Vista to the
printer and will test print fine. I have then re-booted the computer
and will still recognize the printer. But after a period of time when
we have shut down the computer, the Vista machine will not recognize the
printer.

??


--
rinka