nav mesh agent problem, can only be called on active agent that has been placed on a nav mesh

i’m trying to create a 2,5D shooter in DOOM style, and i need my enemy to avoid obstacles, i’ve tried to bake the navmesh zone, i placed all the static objects… but strangely the zone doesn’t color like it’s seen on official unity tutorials.

second, when i start the game, it blocks and gives the error message of “can only be called on active agent that has been placed on a nav mesh” and it seems that in the enemy script it tries to search himself (Alieno) as first obstacle…

Imgur

Imgur

http://imgur.com/aPvXUzo

at first i tought it was a sprite problem, since they are no mesh renderer… but i also tried on a capsule and gives the same thing

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Did you check your scene floor, always must be static

you can check on inspector