well if one person can get on its obviously your client side inis. ake sure the server name is correct, this has nothing to do with your ip. dont listen to all them noobies.
get new inis, the ones u have atm are obviously abit messed up.
tips-
connection closed - ip is wrong
cant login - wrong exe (usually wont happen)
gates wont open - server name is wrong
no notice - unpnp isnt disabled/pc too crap to run mir
exits game instantly - wrong exe
^^ simple as. dont listen to what anyone else says.
on a further note. your doors also wont open if your port is wrong. but with 1.4 files you dont need to change any port anyway.