Armed failures not working

I can't get armed failures to actually become active. Choosing an active failure from the the PMDG menu works fine - the specific failure text will go red and when back in the sim the failure is active. However, when arming a failure then hitting 'apply' and going back to sim the failure never happens.

This is true for any set time period. The armed failure text turns bold in the failures list - is this correct, should it be red?

Anyone had this problem over the years? It used to work fine for me...

Adam Turley