Workflow rule to email assigned resources once project state is updated from Draft to active

 I am writing several workflow rules to notify the Resource via Email when a project that they are assigned to is updated from 'draft' to 'active' state. I understand the actions to send the email. However the evaluation criteria has me stumped in order to link back to a resource. I have tried several criteria that have failed.

1. Set criteria at the $Project.State when was changed to active

2. which is the attached screen shot when a resource in an active project is greater than 0.