Hi, make sure the audio jack is properly plugged in, check the wireing, see if it's damaged. Re-install your audio software make sure it's Win 7 either 32 bit or 64. Also do you have a headphone input on your speakers, most speakers offer that option, that's what i use personnaly because you can adjust the volume from your speakers and not going into your audio control.. Good luck
I would suggest that you do to Realtek's website and download and install their generic drivers for your system. Doing so will re-enable the Realtek configuration utility you had before including your front panel settings.