Problem sending emails to members
 

I have setup SMTP server which works I've tested password reminder* however when trying to send a mass email to all users I keep getting vBulletin message:

Quote:
Please Complete All Required Fields

I don't understand this there are no "required" fields* I've filled outall of the fields that should be required:

Quote:
From
To
Subject
Message

I've also selected the groups that I want the email to be sent to* am I missing something?