Hello. I have a 2000 SSI 196 Chaparral with a Volvo Penta engine. All runs great except when I'm on the water I can shift from neutral to forward and then back to neutral and then reverse a few times. Then it locks in to throttle only mode without pushing the center button. I am then stuck in that mode as I push the button to release it but nothing happens. It takes the control of the boat away and very difficult to dock or load on trailer. What am I doing wrong or not doing that I should be doing. Please help.