help with connecting to server

hello,
i got a little problem...
lets start with that i have bought a new computer....
but on the old computer it was possible to host my server.
and now with this computer i want to do it again.
i use the synestia 525 no MSQL as server base.
and i use that client of synestia too.
i uploaded it on my own version with my server names on it.
now heres the problem.

with the same client i can connect to my own server with the server IP (lumbzpk.no-ip.biz)
i can play with that client on my computer.
but i uploaded it and if some1 else trys to connect it hangs at connecting to update server, and it sais: erro_game_js5io.


heres the client for if you need to help me:
[Only registered and activated users can see links. Click Here To Register...]

i will rep++ every responce.

ohh and i see on server dided windows prompt the computer id that it trys to connect.

greetings lumbzpk