Hello Fred,
I just responded on your French Band-in-a-Box forum post as well.
Perhaps a step was missed in the previous Audio Chord Wizard window.
After you selected the audio file to open in the ACW you have to "Set Bar 1" and then click "OK - Send to BIAB" when you are happy with the analysis. Is that what you tried?
If you press "Close" in the dialog you pictured above, do you not see the imported chords on the Band-in-a-Box chord sheet?