Hi mrleftie,


Make sure that each LW is using a different port number. Tools > options > advanced > firewall will show you which port LW's listening on (& connecting through if you have manual port forward set up).
If ports are the same for both LWs, change one. Best to use a port between 49152 - 65535 (say 65000)

Otherwise check this thread for more tips (click on link): If LW 4 Will Not Connect

If you're still stuck then please post back with your system details, as described in that thread.