wireless connection problem?

I have Limewire installed on two machines. I can Connect OK from the desktop PC used as the gateway machine to the internet. The problem lies with a laptop computer that is connected via a wireless link through the desktop. Both computers run XP and both can access the internet. The PC has XP firewall enabled with no modifications to the default settings. Disabling the firewall makes no difference at all.

All problems are with the laptop which will usually connect on a new install and that is it. If the .Limewire folder is deleted then a connection can be made as mentioned on other posts, but, this is not really a fix. If a connection is lost then usually internet access for the laptop is also lost. The desktop PC always connects and as yet as never failed to connect.

I suspect that LW remembers something between connections that does not allow it to re-connect - since removing the .Limewire folder usually half fixes the problem. It's a pain having to reset all the options - especially when $18 has been paid for the pro version. Re-booting also does not fix the problem.

Is there some sort of clash within the network settings and LW that is causing this? Any thoughts on this would be appreciated ...

Thanks.