I had the same issues when I plugged it in, but I noticed that everytime I used it, after a few minutes of playing with it, it would *warm up* to working correctly for everything including volume up and track up ... which previous to this warm up time, wouldn't function at all...

I noticed I could accelerate this *warm up* period by doing a series of tasks on the wired remote .... then once these are completed all works fine ... after softly powering down the player and letting it rest, then turning off the ignition, I could later come out to the car and everything will remain working fine, even days later ... Like the player had to "remember" that it had a remote attached, it needed to softly power down and save it's information ... now I no longer need to do this series of wired remote actions ... ... let me see if I can duplicate those now for you ... :

1. ignition on + player boot
2. power on player via small round button on face
3. attempt to increase track via wired remote (didn't work)
4. attempt to decrease volume via wired remote (works)
5. mute player via wired remote (top dimpled button)
6. power off player via wired remote (bottom round button)
7. power on player via little round button on player face
8. increase volume via wired remote (works)
9. increase track via wired remote (works)
10. softly power down player by holding down little round button of radio face.
11. wait about 15 seconds.
12. power it back up via any means and try track up via wired (works)
13. power down via any means.
14. wait 15 seconds.
15. ignition off.
16 all is normal for remaining trips in the car.

Sounds quite a bit rediculous, but it works for me.

g

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Rio Car (40Gig) Blue/Red/Green/Amber Face (Looking for 2.0!)
'01 Audi A4 2.8 Quattro