go to settings & check under Internet connection that Outgong TCp is set to connect directly (no proxy), & set incoming TCP & IN/OUT UDP both to unable, also check any installed firewalls (including the windows one), are either off or set to allow winmx, if you've changed winmx version at all, remove any firewall rules you set previously, so your firewall asks again if it should be allowed...obviously, if turning firewall off helps, then ask about configuring it...