Windows 7: Cannot Realtek HD Audio Manager GUI/settings

After accidentally closing the HD Audio Manager from my taskbar a few days ago, my computer's audio stopped working entirely. So, after researching my problem online a bit, I checked in the Device Manager, and Realtek HD Audio was still installed as an audio driver. Taking the advice of another forum, I un-installed and then re-installed it, and I restarted my computer several times (first time it showed up but no sound, second time I had had sound again). This is where my problem comes in: the audio works through my speakers as it should, and the volume mixer reports that it is using the Realtek HD Audio as it's output device (as it should), but when I plug my headphones into the front audio jack, the sound comes out of both my headphones and the speakers. I've seen others with the same problem advised to either re-install the driver or find the small orange Realtek symbol in their taskbar and change settings there. I do not have the symbol as you can see here and I have already re-installed the latest driver twice more since the problem developed. Please advise.
Thanks in advance,
Jordar

I haven't changed any thing since my most recent re-installation, but when I put my computer to sleep mode for about half an hour and then woke it up again, there it was! The HD Audio Manager was back in my task bar and plugging in headphones muted my speakers as they should.
-Jordar