Keep getting error on submit – GetResponse

Hi guys
I’m developing a new website on my localhost environment and using GetResponse for the form, but when clicking “submit” I keep getting 404-errors from GetResponse.

I have filled in exactly as follows (the first line, after the description, then in some, what the form usually look like in a standard HTML-form) – what am I doing wrong?

Form Action:
https://app.getresponse.com/add_subscriber.html”accept-charset=”utf-8″ method=”post”

E-Mail Field:
email
(Would normally be in HTML-form: <input type=”text” name=”email”/> )

First Name Field:
first_name
(Would normally be in HTML-form: <input type=”text” name=”first_name”/> )

Last Name Field:
last_name
(Would normally be in HTML-form: <input type=”text” name=”last_name”/> )

Hidden Fields:
<input type=”hidden” name=”campaign_token” value=”ni4DG” />

The page I need help with: [log in to see the link]