Have you selected the mod in the "game modifications" drop-down in the quick battle setup menu?

No but I will try that.

Stil does not work. :/

Poland, what type of mod are you trying to download? A legit mod? Or possibly a Scenario? Or a script?

Maybe to better understand, can you give us the name of one of the mods that you're trying to load in the game?

The limitless population and nukes script and The Great War. The limiteless one worked once and now doesn't.

yea I can't seem to be gettig the great war mod working as well. I can choose the mod in the quick battle screen, but when the game loads everything looks the same as the regular un-modded gameplay and art/visuals

Is a specific starting age needed, or some other quick battle setting?

Try playing them on multiplayer...

Reason is... I think if you play it in singleplayer, it treats these things like scripts, not necessarily a Scen or Mod.

If you play this on multiplayer, you should have a better time opening it up. Also, you can put all the slots to computers if you don't wanna play with Humans. This should still reduce the risk of crashing, since you are the only human connected to the server for that particular game.

I'm pretty sure that mods work fine in singleplayer, so I don't think that's the issue.

The Great War mod only works in the Industrial Age as far as I'm aware, and you can only use the Germans, French, British and Americans. If you get any crashes, that may be because the mod is still in alpha.

Let me edit that...

If you go on top and select the mod, then That should work fine. If you are using a Scenario, then thats where u can see the problem as I listed above.

Are there many visual differences? I chose custom game and chose the mod in the settings. I can't tell if it works or not, are there any immediate differences between this mod and the original game?

Well there should be some new units at the barracks and possibly other buildings. Other than that I'm not sure if there is too much that is different.