Cant hear audio in track on playback when i set track to record ?

Weird only happening in this song project .. Im using sonar producer 8.5.3 ...My interface is a fireface ufx ...Everything is fine with the interface cause when I go to another project everything is fine ...My problem is in only 1 song project ...I record a track then when I arm the track to record or punch in  OVER THE AUDIO IN IT OR COMP RECORD ...I cant hear the already recorded audio in the track  to play too ...??? ... Maybe there is a setting somewhere in the song project im overlooking ? .....Please any idea's ?