Won't see Brother Wireless

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

However the Vista PC will not print via the Brother Wireless while th
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) an
Norton. We have made adjustments and run tests to link the Vista to th
printer and will test print fine. I have then re-booted the compute
and will still recognize the printer. But after a period of time whe
we have shut down the computer, the Vista machine will not recognize th
printer

?

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rinka