Version B52.3.5 n1 display problem

Hello, this is my first post, apologies if its incorrect in any way.I am building an a320 sim using fds modules.I have been using the excellent jeehell software for a significant while now. Everything was fine until the no2 eng N1 display now shows 4 green arcs all the time, I have re installed the software and have made no changes to any device on my pc, any thoughts.I have a seperate pc as the server, and seperate pc for the overhead and eng/sd displays. I am using the CFM option.