Membership 2 Plugin doesn't seem to be sending automated emails


I'm using the membership pro 2 plugin and the automated email add on but the emails don't appear to be being sent.

I've looked over the help files but there doesn't appear to be anything I need to do to get the emails to send. The original new user email is being sent via wordpress on sign up as normal but I need the membership emails working asap.

Can you please help.

Thank you,