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?

Thanks
Jane