http://192.168.100.1/valogin.asp is the addy I have to use to get to the Shub "control panel", then log in, select "wireless network settings", and there is the option to turn wireless on or off.
I have always had wireless mode switched off, so it must have reset itself somehow, hence my original post. I wonder if it happens a lot, and causes problems for those that don't want wireless on?