Typo3 powermail optin redirect

My static form works like a charm. But when I try to use the optin, the redirect breaks. The redirect is to the same page where the form is send from and additionally my form is hidden an the optinmessage is shown. I want to achive, that I am redirected to a special id and that my form is shown again without the message. Here my code. It´s a static code which I place at the footer, because this form is on every page.

lib.newsletterform < tt_content.list.20.powermail_pi1
lib.newsletterform {
    settings.setup {
            thx.redirect = {$page.pages.newsletter.thankyou}
            receiver {
                    email = {$page.newsletter.receiver.email}
                    name = {$page.newsletter.receiver.name}
                    subject = {$page.newsletter.receiver.subject}
            }
    sender {
            email = {$page.newsletter.sender.email}
            name = {$page.newsletter.sender.name}
            senderName = {$page.newsletter.sender.senderName}
            senderEmail = {$page.newsletter.sender.senderEmail}
            subject = {$page.newsletter.sender.subject}
    }
    main {
            # newsletterform
            form = 1
            optin = 1
            pid = 37
            }
    }
    view {
            # set new template for footer layout
            templateRootPath >
            templateRootPaths >
            templateRootPaths {
            10 = packages/Sites/page/Resources/Private/plugins/powermail/TemplatesFooter/
            }
    }
    }