In 2000 MTH switched from Protosounds to Protosounds 2. In about 2002 the command control system (DCS) was released. Your engine is PS-2 because I have it. The SKU number ends -1. The box will say PS-2.
Read the instructions carefully. Running in Conventional you will still have cruise control which you may or may not like. If using a lighter command control. The engine needs to be set at engine 1. If not set at 1 it will not work. The full DCS system is needed to set a engine 1.