I am UNABLE to do these steps http://www.peachpit.com/articles/article.aspx?p=2274037&seqNum=6 because EVERY TIME I TRY to paint with the brush like the instructions tell me to, it DOES NOT pain on the layer mask!!! NOTHING HAPPENS UNLESS I delete the layer mask and find out that it was painting on the layer all along and NOT the layer mask!!! Google ONLY shows results for SOME OLD BUG in CS6 that was supposedly fixed, there is NOTHING regarding Photoshop CC 2015 on this problem!!! How do I fix this???