Spyball alarm problem

Hello peeps its been a long while since I posted.

Still riding and still on the K5 SV650's.

Today I swapped the battery for a news one and the bike had sat for three weeks due to an ankle injury (un-related to riding) and the alarm would not work.

I.e. if would not switch on via the fob or come n over a period of time.

My spare fob does no arm it either so I changed the battery in my normal fob just n case and still no joy.

Does anyone have a clue how to get it going again? My primary worry is riding and the immobiliser kicks in and leaves me by the side of the road.

Is it worth just having it removed?

Kind regrds

Richard