Having problem playing multiplayer with LAN

[scbw1234]

I had two computer,one with XP and other one with WIN7,Both have the CD version installed.

Here is the problem,My win7 comp cannot host a IPX game even if i had IPX for win7 patched(also had protocol installed and restarted).But could successfully host tcp/ip game.

On the other side,my XP comp cannot host a TCP/IP game which shows the message:"DirectPlay failed when attempting to open a listening connection".But could successfully host a IPX game.I tried the GOG version again on my XP comp but the same message appeared again,so i guess its not the game's problem,i wonder if it had to do with the service.

By the way,TCP/IP works fine with Homm 3 on my XP comp,but cannot join the game that the win7 comp created.