Buffalo HD250LAN NAS box.

I've had this for a while now and have mapped it to a drive letter etc. At first it was really fussy about being picked up by the wireless PC, that was until I set the IP of it to 192.168.0.60 - after this it was picked up fine. Anyway, I've just been asked to backup the wireless PC and the HD250 is seen in my computer and I can browse it perfectly, the problem arises when I go into the backup utility/IP client utility. Neither of these utilities pickup the drive and consequently say that it isn't connected. The PC has no firewall (it's behind a netgear GT624 router, which seems to shield everything well enough), it only has Norton Anti-Virus 2006 - or whatever the latest version is.

It's starting to annoy me now, as it works fine on the wired PC - just the wireless :confused: