OJRovers

Hi - hopefully someone will be able to help me out. I have an Ademco Accord 8 alarm, just this last 24 hours it doesn't seem to want to arm properly. When entering the code and pressing Full Set as normal, there is a beeping noise and all of the zone lights are on solid red. It just stays making the noise until I put the code in again. Any ideas how to get it back to normal? Thanks