Metro 2033 Ranger Models

I downloaded these: http://www.garrysmod.org/downloads/?a=view&id=128051 . I currently host a FastDL Garrysmod server off my PC. I put these into the appropriate files, then upload to the FastDL, and they won’t download. The same goes for any other models that I upload. I’m not sure if it’s the lua script or what that I need to edit to get it to download. Any help would be great.