I don't know the exact wording for it, so let me explain it to you.

I only dual box on 1 Monitor. I have 2 visual screens up. A large full screen view, and a small Pip view that is always on top.
How my system normally works is that if my mouse or cursor is in the Large Screen area. I can operate everything dealing with that toon. And my do-not-passes, don't pass find, now if there is a button that is selected as do-not-pass, and I wont to use it on the other toon. I'd just mouse-over the Pip view, and I can hit that key and it works fine.

Well now for some reason I can't just mouse over the pip screen, I actually have to click inside the screen. And then click back inside the Large screen area to continue with my original toons abilities. Why is this, and how can I get it back?