Linksys WRT150N – random loss of wireless connectivity

Just installed a linksys wrt150N home router. Randomly the wireless connectivity portion of the network disappears. Can’t find this router with any machine unless I connect via ethernet cable.

Linksys has been most unhelpfull. The only response I get is the url for their “easy connect” utility and then …”we can not help you from this point on”.

Any suggestions?

TIA
Matt