autopage help needed!

i have an autopage rf-310 and its been working great for me. but today, i tried to change some of the options and i noticed that my led stays on constantly now. i disconnected the battery and reconnected it and it still says on even when the car is on. most of the features still work, like it locks my doors and flashes the parking lights, but when i try to arm or disarm it, it seems like it arms (flashes parking lights and locks doors) but it doesn't chirp. it also doesn't go off when i open a door. is it screwed? is there a way to reset it or something or does it sound like the unit is just busted?

thanks!