MCI-CDAudio / MMC works, but can't change tracks

hi
since a few days i'm trying to find out how to change tracks on a MultimediaControl i put on a form
the buttons PREV and NEXT are enabled and work as desired
the Buttons BACK and STEP are disabled and won't get enabled for unknown reason (!?)

my goal was to press a command button to navigate to a specific track
or to press another command button to set the player to a specific location within the track

now the probem is ...
wether i use this:

MMControl.From xxx
MMControl.to yyy
MMControl.Command "seek"




or this...


MMControl.Command "next"




within a program the MMC won't do something
the commands PLAY STOP OPEN CLOSE EJECT are working fine

is there someone knowing how to get that workin' the way it should ?

thanks in advance
Tamara


forgive me.. i'm blonde...lol