The VG Resource

I enable 3d ripper dx, it says ready to capture at the top right corner, but it doesnt rip anything when I press F12, or any other buttons

Are there some settings I have to change in dolphin for it to work properly?

Dolphin by default already has stuff assigned to the keys 3D Ripper DX uses. You can either try to disable them, or assign 3D Ripper to another key that doesn't do much in Dolphin.

If you're really having trouble you can PM me about it.