MY plugin is RED coloured and doesn't work , what have i done wrong ?

I am trying to use the Poulin Le Cab 2 plugin , i have a load of impulses , i load them up but i do not hear the effect, i think i have it set up right , but the plugin appears RED in the sidebar where i select the plugins .
 
I am creating an audio track , adding the Le cab 2 plugin , then inserting on of my impulses into the Le Cab 2 , and i have input echo turned on but i just dont hear the effect .
 
What am i doing wrong  ? ?

I solved it , i was not putting an Amp sim before the Cab in the effect chain so it wasnt working at all ,i have now solved it through a lot of youtube watching haha
 
Thanks 
 
Dan