You'll need to do this right after a RAM clear.
Again, make sure your payout percentage includes SAP.
Click Setup, Comm Setup, Serial Ports.
The bottom option should be progressive type. Touch the box (it may say None).
It should pop up a warning that it made some settings for you. Touch OK and back your way out of the menu, finish any other settings and exit settings.
Some of this (again) is from memory since I haven't gone thorough all of the setting from scratch. And I only set them up for TITO too, so I'm not sure if it will make a difference if you don't.