hmmmm, how do i fix this?

[baturkin17]

some of my walls, are like not there, i cant walk throguh them, but other things can go through.

here is a small vid showing what i mean, its 666 kb ( )


http://home.graffiti.net/baturkin17/why.wmv (save target as)

do i have to go back into 3ds max and somehow redo those walls?

any help appreciated.

[[cc]z@nd!]

make surte u don't put a "!" in the material's name, the "!" gives it no collision model