Line-in Jack and Microphone Headset

[yakisoba]

Okay, I got my 15" 1.5 GHz PB today, and I love it.... except the backlit keyboard doesn't work (see separate thread), and I am wondering about the line in jack. I bought iListen, without the headset because I already have a headset, that I have used with a PC using Office 2003 Speech Recognition. But I don't get any signal showing when I attempt even the Apple Speakable items with the line-in microphone. I understand that the line-in jack is set up for powered input. Does that mean that I need to run my mike through an amp and then to the PB?

Thanks.

[superbovine]

system preferences

then the sound icon

select the input

then select line in

your welcome

[yakisoba]

Uh....yeah....I already tried that, before posting. I'm pretty confident that the mic has to be powered. The line-in will register a signal if I take (for example) output from a CD player. But if I swap the plug with the mic, it registers nothing. Maybe I'll just go with a USB mic and be done with it.