Need help with Brush Tool!!

Hey guys! I downloaded some custom brushes and I can't seem to get them to work right now. I have used them in the past with no issues. Now when I select them the outline shows on my layer but when I click for it to be put on there just nothing happens, I'll just keep clicking and nothing pops up. I've looked up all the solutions people have found deselecting everything, caps lock off, all of that. Have no clue what is going on. Thanks