Server help [my server help]

This post still counts as server help cause I need help with a server..
Ok, I started making my server and all but I need help, when I say 'Run server' It works and all-and I compiled before-but when I try to enter it sais Error Connecting to server..

These are the steps I did to do it:
1) Opened/Entered no-ip the downloaded 1 and checked that my server ip is working.
2) Compiled successfully.
3) Pressed 'Run Server'-worked fine
4) Went to the client-and wanted to enter.
5) showed me error connecting to server.

Please help .. thanks..

[yes I opened the port but I wanna open 5555 because I got a 474 source..thanks and please help]

are you putting in an ip because if u are thats why ur owner u dont need ip lol so for ip dont put anything..

coal said ip 127.0.0.1 but that doesnt work to...

listen u dont need an ip ur the owner so for ip dont put ANYTHING

So have you solved ur problem wathe?