How can I get the Line in and Microphone inputs to produce sound through the speakers ?

The input is present, but no sound.

 

Has anyone else had this problem ? (Dimension 9200 PC, Vista Home Premium).

 

After a couple of weeks of pain with Dell Technical support, I have pretty much downloaded the whole plethora of drivers - and still no joy.

 

Can anyone recommend me a driver that will allow me to do this please ?

 

Dell are telling me to wait 3 weeks for a Vista upgrade from Microsoft, but after recent service from Dell Technical Support, I wont hold out too much hope.

 

Many thanks

 

Nigel