Character selection area is not working, please help.

Hello, The window that should open down and allow me to select fonts does not open.
Even though I click, I get no results and I can't use the font window.

I'm using Adobe Illustrator CS6 and the character selection panel doesn't respond at all even though I click it. The area where I click to select a font in all character panels does not respond and I cannot select a font. Please help me on this issue.