Blocked port??

Hi, I have another problem. I have a srcds on my computer and connection by router. I open ports on router to srcds and is visible on internet. Unfortunely I have a dynamic ip but I use no-ip. My problem is that if I write an ip addres I can connect to my server but if I write my domain address I can't connect. Do you know what should i do?

Create an account for free and create a host service. You will be able to connect using something like franczez.game-host.org:<port>

http://www.dyndns.com/

yeah but I have it arleady. like franczez.servegame.com. but i can't connect to server. everything is good but i can't connect to server