Singleplayer button getting "stuck" with one mod

[Lynxbrutal]

I've been working on a mod that adds the requirement to claim and settle a tile before building cities. I'm finally entering a testing phase where I can see how it works in game. Unfortunately, when ever I select my mod in the mod menu and go to press singleplayer, the button gets "stuck" as highlighted and is unclickable. Like this: http://imgur.com/a/OYcU8

The files I edited in C++ were CvPlot, CvUnit, CvUnitClasses and CvUnitMissions. This was just adding 2 new unit actions, and 2 parameters and a few functions to the plot class. I also made some edits in CIV5Missions.xml, CIV5Units.xml, CIV5UnitClasses.xml, PlotMouseoverInclude.lua, and the UnitPanel files. all the changes go along with the changes in the C++.

I compiled the CvGameCore.DLL in visual studio 2008, and I'm packing the mod through modbuddy. I have no idea what would be causing a change to the game's menu because none of the changes I made should be effecting that.

I'm doing this all for a final project that's due next week so any help would be appreciated.

 

[Gedemon]

in the mod's properties in modbuddy, verify if "support single player" is checked

 

[Lynxbrutal]

Finally! Thank you so much! Now I actually know that my stuff doesn't work! I just need to figure out how to properly add a unit action.

 

[Worf2324]

I have a similar problem. What command brings up "support single player" in ModBuddy?

 

[LeeS]

1. Solution ModProperties DropDown:
   
   Spoiler :

   
2. Modinfo_ModProperties:
   
   Spoiler :