Sound problems with the line in for vista (sigmatel)

I recently upgraded to Windows vista. After doing so, my line in for my
sound is no longer working! my volume mixer doesnt show anything as if its
muted, its not even there.

When I right click, and select playback, it only shows speakers /
headphones, checked as if working properly, no line in is visible.

When select the recording tab, it shows my microphone as working, and
checked. underneith it shows my line in, but says "currently unavailable",
and it is not checked. (and wont let me configure). When I look further
into it, and right click, selecting properties, It says (under controller
properties) that it is working properly! It also shows that the jack
information as rear panel 3.5 mm jack (its not, its a traditional jack like a
headset or microphone utilizes. under device usage: it shows use this device
(enable).

Im sure there is some way for me to "enable" my line in jack so the sound
from my other devices comes through, but i do not know where to go.

I have a sigmatel driver. I sat through Dell customer support and
downloaded the new Driver that works for sigmatel, uninstalled the driver,
reinstalled. Also retrieved a driver directly from sigmatel for the issue,
and still nothing. This is why I presume there is just a simple setting
somewhere.

Any idea what im missing?