help with sign up email plug in

i'm having an issue with the password delivery for new blogs. when a new blog is registered there is no email sent with login and password. am i missing this somewhere or is it meant to happen automatically?

this was before i installed the plugin. now, after dropping the plugin into the mu-plugin folder the sign up process work fine and they can choose there password however upon completion when you hip submit the page reloads blank. (template is intact just noting else on screen)

the blog is create successfully but no email is delivered...