Map not loading in campaign

Leading from one map to the next the next map will not open - the map you are leaving from stays.

EXAMPLE:

Cinematics (runs well)
Chapter 1 (does not work)
Chapter 2 - works from the button (unknown if it will load from map Chapter 1)

Trying to load the next map from the buttons page of the campaign the screen fades to black, then fades back in on the button page.

The map will run from the WE. not from the game (TFT). It was (past tense) working.

Possible issues I should look at would be???

Does it matter if I use WEUnlimited to edit the maps? (No advanced triggers used, just advanced doodad limits and textures)