Help with retroarch !!!


Do not know if this is the proper place, if not please move
I am trying to play Coleco Adam games on Retroarch
I have the proper core installed gearcoleco_libreto
But when the option to choose it comes up after the load content stage, it is not one of the ones availabe
I reinstalled the core numerous time.
It just does not find it
And if I try to run content under any other core, it spits me out
an someone help.