I do not know the "I" igniltion. That must be a Horizon-Evolution thing. please contact them for support.
Anyway, If it is the black potted ignition, you should use at least 6 cells, or two Lipo. Check your switch, check your cable harness.
The normalMSR ICU ignition goes into sleep mode after about 60 seconds non-activity. (it needs to see BOTH magnets in the correct sequence to prevent this)