Cannot create/save newsletter

I installed this plugin and entered my SMTP server settings. When I try to create or send test newsletter I click on "Save" and the button does not respond at all. Same with "Save and continue" button.
Here is my SMTP server settings that I entered
(I wonder if the way I entered them causes the problem):
SMTP Outgoing Server: mail.paidinstyle.com (I also used: ssl://gator1076.hostgator.com:465)
SMTP Username: info@paidinstyle (I also tried to use info+paidinstyle.com as my host settings suggests)
I am trying to change it around but nothing helps.