Flag box : yellow caution / Yellow flags not activating

Hello all

i recently purchased a flag box off etsy. while I have added some of my own effects /animations - one of the prebuilt/included code for the flags has yet to activate..

I play  iracing - and I have seen the yellow flag pop up on my screen in game and the flag box does not blink or show a yellow flag. the animation is there to blink and  I go into the bindings this is the code I see below - should it be something else?  I ask because I was in a race last night and there was a yellow flag as there was a crash or something ahead of me and I almost hit them and made me spin out...

any help would be appreciated to get the yellow working.

[GameRawData.Telemetry.SessionFlagsDetails.Isyellow] = True