It happens to me that I thought I did all perfect, but when I double check the instructions that were given to each button, e.g., there are THREE status that a button could have: VISIBLE, INVISIBLE, and but not less IGNORE (with the X symbol), the thing is that you have to revise all the actions that will be involved in the document, paying attention that the IGNORE status will is giving action to nothing, I mean, I was distracted that the X symbol of the IGNORE status could mean (to my logic way of think) hide, or: don’t show, avoid, etc.

The other thing that you can think about: as more instructions given to a button better, this to try to avoid non-working stuff.