Manually Inserted Lightmaps: They don't show up

I have to manually insert lightmaps because Unity crashes when doing it automatically. I've put in the 56 Near maps on the left row and 56 Far maps on the right row. However, the scene doesn't show any lightmapping -- I turn off the lights and it's just dark, and all the shadows are still being drawn live.

Any idea how to get the lightmaps to actually show up?