Editing [SOLVED]

(sorry…I am french!)
I just installed Audacity and record from a tape recorder successfully (it’s appear!) Then I have registered the project in my repertory.
My problem is I can’t read it. I start with the “green arrow”, the barre translante normally reading de project but no sounds producted from PC!
What i have to adjust to obtain result?

Ensure that you have the correct playback device selected in the device toolbar.

Sincèrement m’y Last message. I visited the tool barre and found the connection to the source was not correct
Now it’s OK