Thanks for your responses guys. Firstly, the laptop is setup with a static IP address. I presume the DNS info is ok, as normally the system works without problems for surfing the net etc. I basically have 3 network interfaces, eth1 which connects to the cable modem, eth0 which connects to another windows machine and wlan0, for the wireless network.
Yeah, rebooting does seem to help. I've been in touch with the acx driver people and they''ve recommended updated the firmware. I'll try that and let you know how it goes.
Cheers
Lee