To move between windows in Screen

I have the following in .screenrc

 # I want to use Vim's navigation keys
 bind h focus down
 bind t focus up

I would like to be able to move by Ctrl-A t to a next window, while by `Ctrl-A h to the previous window.

However, the above mappings do not work anymore for me.

How can you move between windows in Screen?

To move between windows in Screen