Problem with windows explorer

Hi, First here is my OS: Microsoft Windows 7 Professional SP1 x64

I'm having trouble with windows explorer in relation to Firefox 8.1, download box. Usually when I right click the downloaded file and choose "Open Containing Folder", windows explorer will pop open that directory/location window, but something is wrong now because it just flashes the folder window in the task-bar (collapsed). I have to click the flashing folder to open it. Any settings to correct this? TIA!

What folder have you set in the firefox browser for the default download location?

Have you cleared out the browser cache/cookies?

Have you rebooted your computer?