Hmm. My config.ini looks like this, I think it's a bit different than Mark's example.

Some of this is deliberately there so that it changes the behavior even in standard playback mode (pressing left and right while the volume bar is up makes it go away and take effect instead of having it not work), but that's unrelated to the tuner stuff.

[ir_translate]
Left.LT=b9460c.L
Left.L=Left.L
Left=PrevTrack.V,Left.N,Left.U
Right.LT=b9460d.L
Right.L=Right.L
Right=NextTrack.V,Right.N,Right.U

Top.L=Top.L
Top=Pause.V,Top.N,Top.U
Bottom.L=Bottom.L
Bottom=Bottom.V,Bottom.N,Bottom.U

PrevTrack.LT=b9460c.L
NextTrack.LT=b9460d.L

Hope this will help?