1and1 domain name redirect HTTP or Frame with Heroku host?

So I purchased a domain from 1and1, say it's www.mysite.com, and am hosting my app on Heroku myapp.herokuapp.com. I have two options for forwarding the domain - HTTP and Frame. HTTP forwarding seems to just redirect my URL from www.mysite.com to myapp.herokuapp.com, which isn't what I want. But I am having a problem with Frame redirecting - if I navigate on my site to various pages (e.g. myapp.herokuapp.com/users), it will still say www.mysite.com on the top, but not www.mysite.com/users. How can I get the URL path to display correctly?