Problem with light in elevator

[BigDaddy0121]

Ok I managed how to get light moving with the elevator, but now another problem.After I've inserted skybox and sun_env (something like that, u got it), light inside the elevator looks like this
http://img10.imageshack.us/img10/7894/49606975.th.jpg (http://img10.imageshack.us/i/49606975.jpg/)
So light from the sun goes inside the elevator when it's not supposed to, elevator is blocked from the sunlight by walls.It also causes problems with red light inside...so help please.:confused:

[haymaker]

tools/ blocklight (http://developer.valvesoftware.com/wiki/Tool_textures)

[BigDaddy0121]

That's exactly what I've been thinking of, thanks.