Same problem here. Can't connect after upgrading. Have always been able to get on before upgrading to this version. I have ZoneAlarm and it is configured to allow Limewire through. Windows XP, 1 gig of ram. It continually says "you are currently connecting to the network". It doesn't change. Nothing has changed on my computer except for upgrading the software.

***EDIT***

I fixed my problem by deleting my preferences folder '.limewire' and then resetting my preferences. Hope this helps.