no send button on e-newsletter

Hello everyone

I want to start using e-newsletter. I set it up a couple of months ago and sent a test campaign which was successful. I've just come to send another but when I click on 'send' beside the new email, it takes me to a page which only asks which group I want to send to; there is no send button here.

I've tried several times and have been trough the settings and it all seems correctly set up.

Can anyone help me identify the problem?