Character Map Issue

I installed Character Map, and nothing happens (a window is supposed to pop up) when I click on the new button in “Write Post,” but I’ve discovered that it does work in “Write Page.” I’m wondering if this has to do with the fact that on my “Write Post” page, the buttons carry over to a second line, due to my adding a couple extras (including Character Map). The buttons stay on the same line in “Write Page.” Could this be causing the problem? If so, how do I fix it? Thanks!