Hi Don, Hi Paul,
thanks for your advice, it worked almost fine, but only after
all other components were deleted from the Library->QuickTime
Folder.
When i copied all other components, Avid, IMX, etc. back into the QuickTime Folder and restarted PremiereCC, same problem again.
Then i repeated Dons advice with the Avid codecs. Download from the Avid page, unpack manually,
copy back to the QuickTime Folder, restart. Works fine too.
Cheers,
Martin