Ubuntu Lucid Lynx and my Bluenext wireless adapter

Update : I can get round the issue by using static IP address - i.e. bypassing the DHCP as this appears to be where the problem lies. Just turn off DCHP by selecting manual in the IPV4 settings, give yourself an IP address (make sure it doesn't conflict with what the router may assign to others on the network - you'll need to do this on the router), set the gateway (usually the internal network address of the router 192.168.1.1 for example), and the DNS servers - which could be the router and your ISP DNS server. I didn't set anything for search domains.