OK, I'm getting closer. It turns out that there wasn't a wireless card installed! I found a refurb one on
http://www.getpartsonline.com for $20 and installed it today.
I went to the mepislovers website suggested by David. The instructions said to run modprobe ndiswrapper and then iwconfig. I did this and these details of my card are shown:
eth1 IEEE 802.11-DS ESSID:"" Nickname:"HERMES I"
Mode:Managed Frequency:2.457 GHz Access Point: 44:44:44:44:44:44
Bit Rate:11 Mb/s Tx-Power=15 dBm Sensitivity:1/3
Retry limit:4 RTS thr
ff Fragment thr
ff
Encryption key
ff
Power Management
ff
Not sure where to go from here though as the instructions on the mepislovers page get a little foggy at this point.
KWiFiManager's window keeps looking for an access point but doesn't find one. I'm filtering by MAC address and have added the address to the table in the router. The router works with my Windoze laptop ok.
What's next?