generic mic and windows xp?

I bought this thing. It looked simple. It's a headset with mic, JASCO 98970. It comes with no instructions. I plugged it in -- mic jack to mic receptacle, headset jack to headset receptacle. I checked toi see if there was anything to install. Nope. I did the search to make sure. Nope. I found "windows sound recorder" in the accessories menu and opened it up. I opened a new file. I pressed record and talked. Nothing. Again. Nothing. I looked at the file properties and I did not understand the formats that were offered -- I had never heard of them. So I tried different ones. Nothing.

I went to JASCO's website and there's no mention of the product, and no FAQ for anything. I did find an demail form and filled it out with all the information. I have run out of things to try.

Also, I'm having trouble posting too.