Newly created servers can take some time to be polled on the master server as they use cache systems to prevent abuse/reflection attacks.
What this means is your server can take anything from 5 minutes to 2 hours to correctly start appearing in game for you to join via the game browser.
Alot of times steam games allow you to direct connect to your server wich you can use in the mean time, find either a direct steam connect link in your game panel to share with your friends, or add it to your steam favourites
Follow these steps to add your server to your steam servers list:
1. Open the main steam window on your PC.
2. Click View > Game Servers.
3. On the new window that has popped up, change to the favourites tab.
4. Click the ADD A SERVER button.
5. Enter your servers query IP and port.
6. Click the ADD THIS ADDRESS TO FAVORITES button.
Now launch your game your normal way and browse the in-game favourites list. Your server should be on the list.
