Does this happen to you?

[aznmode]

They are correct about the 3poles 4poles. I've had the same issue with several adaptors I've tried. You need to invest in something like these. The 2nd one is what I use in my car since it has the charger port on it also. Both have microphones so you can use either of them for making calls also using your stereo speaker as audio output.

http://cgi.ebay.com/For-HTC-Mogul-Da...QQcmdZViewItem

http://cgi.ebay.com/2in1-USB-Adapter...QQcmdZViewItem