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:

http://i.imgur.com/XvHVWak.png[/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:

[t]http://i.imgur.com/Hn2kREm.jpg][/t][t]http://i.imgur.com/RovMlzL.jpg

What is this bug ? How can I solve it ?

Thanks in advance !