blender object issue

heyy i import a object from blender and texture it in unity it come up fine but the FPS controller falls straight through it plz help lol

It is not a Blender issue. Please, read the basic manual at least.

You need to add a collider to the object.

http://unity3d.com/support/documentation/Manual/Meshes.html

heyy i done that but it still falls straight through any ideas

Did you put the FPS controller object high enough for not touching the object? If his bottom is already inside the the mesh, maybe it cannot read the collision. Other than that, we would need some more info to know what is happening there.