The silent engineer

Can someone help me...I'm playing a GP4 championship with a friend (2 drivers-Hot seat) ,we're both drivers of the same team(Slayer/Audi) and when it's time to leave the Box/Stand and get on the track the engineer says only 'O.K.!" to the second driver(Me) and not to the first driver...I know that it is not "that" important but it's frustrating...I must add that I use a soundset in GPX-Patch but the "O.K.!" sound is originating from the original GP4 game soundset...