"resource.AddFile" Clients download file forever and hang on load screen.

For some reason clients do not download the files I include with “resource.AddFile”. The server is run off my computer, ports open, quicky server just for testing purposes. People can join just fine, however when I include “resource.AddFile” with the needed file they get stuck on the loading screen forever on the first file. What is causing this as it is quite frustrating? “sv_allowdownload” is set to 1(true) and I can’t think of what else might be causing this. The files to be downloaded are all fine and valid files, just a simple (7.62kb 64x64 material.png).

sv_allowdownload?
I’m not sure if that server command bars players joining, but it seems like something it would do.

Thanks for reading my thread.
Maybe it has something to do with the ports?