FPS Controller falls through terrain

I have upgraded to unity 5 and am having some issues. I have a FPS Controller imported from the unity assets and yesterday it was working before but now for some reason it just falls through the terrain. I have tried importing a fresh copy but nothing happens and it just falls through for no apparent reason. My terrain does have a terrain collider so im not sure whats going on, any help??

The first, ensure the trigger is not checked. Or maybe in the terrain collider , terrain data you lost de terrain data. Check it.

Sorry my english is bad, but i hope to be usefull.