Originally Posted by Abyss

When you make a mod, check the Exported Mods folder and the Mods folder in the Data folder in the toribash save location.

Rename the mod named modmaker.tbm to whatever you named the other one, and keep it in your data/mods folder. Load it in singleplayer to see if it loads properly and then try it in multiplayer (that's how I got some of mine to work)