problems with ath

[Fco Jerez]

Hello,
I'm trying to configure a cardbus wireless card (D-Link DWL-G650 that uses the 
ath driver) on my relatively old laptop (Pentium not-MMX 133Mhz with 48 Mb of 
memory).
I load the ath_hal and if_ath kernel modules, then I configure the interface 
using "ifconfig ath0 inet 192.168.0.7 netmask 0xFFFFFF00 ssid mynetwork up" 
and it apparently works well,but when I ping a host some packets get lost (I 
get response for some packets and then it losts other packets,i get response 
again...), and when i do a more expensive operation like ping -f it starts 
sending packets and after some seconds i get:

ath0: device timeout
ath0: ath_reset: unable to reset hardware; hal status 3

then it sends more packets and says the same more times again...

The ftp transferences doesn't work well, after showing some times the same 
error that "ping -f" prints, it stops transferring...
Furthermore  the system sometimes becomes unstable and it just hangs without 
printing anything to console.

Any idea?