How to set the page after signup

How to set URL of the page, where affiliates should be redirected after signup:

- If you use the standard signup form, then go to Configuration>Affiliate signup>General and enter the page into field "Affiliate is redirected to this URL"
- If you use your HTML form, then you should add into source of the form this line:
    <input type="hidden" name="successUrl" value="http://www.page_after_signup.com/">