Membership Pro Communication Emails Not Working

Hi
We purchased the membership plugin for the beetlecabrio.co.uk website however the communication emails don't appear to work despite being configured to reminder members when their membership is due to expire etc.

So I've bought this again (latest version) and installed it on a fresh, clean website for test purposes: http://www.mlsdesigns.uk/cabrio2/

I have setup a subscription and configured the communications (attached) however the notifications do not send. When testing a signup, I do receive the wordpress username/password email but I do not receive the configured communication welcome email.

Subsequently we do not receive any of the reminder emails.

Can you please investigate?

Thanks
Mat