[ltp] T40p wireless doesn't wake up after sleep

[Phil]

Hi
I'm running Fedora Core 6 with the latest kernel (2.6.18-1.2868.fc6). 
Wifi using the madwifi 0.9.2.1-1 worked like a charm straight out of the 
box from a clean boot, but if I suspend then on restart the wireless 
refuses to connect.
If I run "iwlist ath0 scan" it shows my wireless access point, but 
network manager refuses to reconnect. Interestingly the wireled LED 
doesn't flash at all, suggesting the hardware is just not responding. I 
suspect the scan results are false, because if I move to another area 
with a different access point SSID then the scan still shows the old one.
If I hibernate/resume the scan returns "No scan results" and the 
wireless led still doesn't flash.
The only thing that seems to recover it is a reboot.

Any ideas?
Thanks
Phil