Gold Source Model with Invible floor problem.

Guys, I’m making a mod for Half-Life, and added a “copy” of the Osprey on the hl.dll, its just a copy to change the model so I can use both of them.

I’m using this helicopter:[/t]

I’ve compiled it without any hitboxes as you can see in the model viewer, but inside a test map, there’s a invisible floor below the model that prevents the grunts from rapelling: here’s a pic of me standing in this invisible floor that doesn’t appear neither on the SMDs or the Model Viewer:


What is this bug ? How can I solve it ?

Thanks in advance !