Server using FASTDL - Won't activate materials?

So, I’m FASTDL’ing gamemode content from gamemodes/underdone/content/, the client downloads the content (which is bzipped), but when he spawns, he still sees missing textures.

This is strange, and I’ve tried everything to fix it, I’ve tried making an addon just for the materials even, but to no avail.

They just download the textures and they aren’t even used.

Any suggestions?

(User was banned for this post ("Post in the correct section! Read the rules." - Swebonny))

I am having issues with fastdl too, but for maps.