Insufficient permissions to add a listing although each role has rights

Hey - I'm using the Directory listings plugin. When I'm logged in as a super user I can add a listing without issue .However, when I create accounts at the subscriber level - although they can see Listings in the back end - they get an insufficient permissions error when they try to use it.

This is for a sub site within a multisite installation.

I set the roles and capabilities but no such luck.

Any suggestions?