I NEED HELP! Texdraw doesn't work

I was trying so hard to texture paint my model. I made just what every tutorial said, but there’s only one thing that isn’t working. When I try to use the Texdraw brush, it just doesn’t work.
When I use the fill brush or the mask one, everything goes well, but as I change to the Texdraw one, nothing happens.

Here’s a screenshot, so you can see my configuration.
I really appreciate you help