Sound comes from my laptop speakers even when I have headphones plugged in (in this case, going to external speakers)

Before upgrading to Hardy, sound would play from my external speakers and my laptop speakers, but when I hit mute, my computer speakers would shut off. Now, if I hit mute the external speakers mute too. I don't want my ****** laptop speakers to play anymore! I have a lenovo, and I've tried everything in this thread:

http://ubuntuforums.org/showthread.p...peakers&page=2

Also, when I go into alsamixer, there is no bar allowing me to adjust the volume for the headphones.

Any help is greatly appreciated!