Older Audiomontage muted

If I load an older audiomontage from a privious wavelab version the playback is muted. Theleveldisplay onthe track itself shows someaction but the mastder level disoplay shows nothing at all. I can play the audioclip itself n, no problem. If I replace in the audiomontage the none hearabel clip by any other clip the mute of the audiomontage stays on??? Any help please. i know the issue seems to be weird
Carsten

Did you try to mute/unmute the track(s) ?

How is this be done

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WaveLab version Generation
search on “mute/unmute the track(s)”

in web or pdf product manuals

regards S-EH