Can't 'rejoin' my own wireless network...

When there is a power failure and my wireless gets disconnected I
cannot get back on my network once the power goes on. I have no
problem using a neighbor's network but if I try to go on mine I get
the message: An Error occured while trying to join my network. Why
does this happen and how can I get back onto my network? I have a
Netgear WGR614.

thanks.