first i love Z xD it was my first game i bought in my live in 1996 and i love it

Computer settings:
Windwos XP Sp3 ; Hamachi Version 1.0.3.0
My Problem:
i downloaded the Z Expastion from yoorwire.net (it includes version 1.6 for XP/Vista(32/64bit)) (link: http://board.yourwire.net/showthread.ph ... p+brothers) and installed it and there were no problems. I can play it in singleplayer without any problems but if i want to play with my friends at the internet or local network (router) we can't play.
We tried it with using hamachi but it still doesn't work. I also opened the prots @ the router and deacitvated the windows firewall. We'r able to ping at us in the hamachi network but if i or my friend opens a game, the other one see's the game but when he or i want to join the game it loads and after a while a sandglass (mouse curser) appears and then the lan window closes and opens againg or the game hang's-up (windows taskmanager -> kill process).
i also have the original version and it also runs with dosbox but i don't think that we can play on lan with dosbox so i searched if someone has the Z95 version and so i downloaded it.
Do you have any ideas how we can play or do we use the wrong hamachi version? i'l like to play xD
best regards
Sn0rr3