Hi unit@d,
If you are having issues with your headphone buttons you will want to follow the steps in this article -
iPhone: Hardware troubleshooting
http://support.apple.com/kb/TS2802
Specifically this section -
The stereo headset buttons are not functioning properly
- Verify the headset being used is compatible with the iPhone.
- Verify there is no debris in the headset jack.
- Insert the stereo headset and play audio using the Music app. Verify both left and right channels are functioning.
- Press the center button to see if it can pause and resume audio.
- Make a phone call and see if the microphone is working.
- If the issue persists, try another headset.
- If the issue persists with another headset, have the iPhone serviced.
Thanks for using Apple Support Communities.
Best,
Brett L