Problem with Campaign malfunctions

I seem to have this problem pretty regularly and I can't seem to figure out what the problem is.

I have worked on three seperate maps pretty signifcantly and wanted to bind them together into a campaign so I can finish them, and use them together in a custom campaign.

I uploaded all the maps and began putting in Campaign imports and custom data, I linked all the maps together and made sure they were used in the menu screen. But when I go to click on a chapter button to choose a map to play, the button doesn't respond. I don't understand why when everything is set up to work correctly, it just doesn't.

Does anyone know the source of the problem or a way to remedy it without starting completely over?

Thanks.

maps within a campaign cannot exceed 4 mbs. If you have large files, just place them in the campaign imports and load them from there.

Ah! I will try that thank you!