I can't install BGs in GMod

I keep downloading BGs from the GMod site, but only 1 out of 10 install. Can anyone help? I’ve been putting them in the right folders, but they never work…

Are you sure your posting all content right into /garrysmod?

some of them are meant for only widescreen or for 4:9

He probably has a low or really high resolution.

Not a big loss.