There is no Solenoid 7 in the SOLENOID TEST menu, it skips from Solenoid 6 (Gumball Diverter) to Solenoid 8 (Outhole) 
Matthew
OK, here is a better guess - there is a setting in the ROM that says the knocker is not installed. It is adjustment 3.21 - it should be set to Off to utilise the knocker, but is probably set to something else.
This sounded promising, but alas no joy again. There is no adjustment 3.21 in the Adjustments menu 
Matthew
JUst to be really clear, their are three adjustment menus; I am talking about item 21 in the third adjustment menu. If this does not exist, does it jump from 19 or 20 to another number (eg 22 or 23)? What is the value at item 10 of the third adjustment menu?
