Hello. Could you please write the exact name of the CAD program and it's version? As for Alibre there's an Addin from 12 version only. So, that can happen because of the earlier version of it. If the connection between the CAD program and SprutCAM is done, there should be green points instead of red ones. In your case, it means that there's no connection between the programs.
Also, please, check out, if the option is enabled in Addin Manager.