[Help] People can`t connect

Hello..
I made this MuServer "Czt MuServer v1.0 full final version"
Work fine but just me i can connect in the server and my broather from the same network...
I have Router in my modem but i don`t know what to do because people when they try to connect..they can`t enter to log in account because they get disconnect..
i Mean... they start luncher and connect and is ok... they can see my server but if they want to log in with account and password they get disconnect :( and i don`t know what to do... i opened all ports from 1to65535 or something like that..i check again and again all ip in my server and i try many things...but nothing work...
I need some help... thanks alot and sorry if is another topic somewhere here... but i try to find... and i didn`t find one...
Thanks alot..
have a nice day.

dont open from 1 to 65535 just open exact ports

44405/55901

also firewalls off

it should work somehow.

check if windows fw is not blocking gs

Thanks alot for help! Now server work fine :D

Thanks again and have a nice day guys!