The only user-programmable component of the IFI control system is the RC (Robot Controller), in this case you're using the EduRC. The OI isn't user-programmable. There's a port labeled "Program," or "Programming" on the FRC RCs, and on the EduRC, you'll need to flip a switch to indicate whether the DB9 port is used for either "Programming" or "Tether."
Check out IFI's
Legacy Documentation for more information.