dunnyrummy,
This sounds like you originally had maybe a XP firewall enable itself on ya, its common with updates that it sets itself to 'Protect' when you had it off. Check that is either disabled, (with a different firewall already installed) or set the ports in it that WinMX uses.
https://www.winmxworld.com/tutorials/firewalls-xp-sp2.htmlOnce you have those set up, or the XP firewall off again. Be sure to check that your WinMx has ports set also.
Settings > Internet Connections > Incoming TCP.. set this to either 6699 or a port of your choosing that is also in the firewall.
and.. IN/OUT UDP ports ...set this to 6257 of again one of your choosing.
Also if you have Norton Internet Security ..be sure that not only is WinMx allowed in the firewall but also in the Worm Protection.
Let me know if this helps or not.
I am unclear on what you mean exactly by the 'first beta fix' from here also..