Password input not working

Hi,
I am working in Harlowe at the moment and I am pretty new to programming. I am trying to have the players input the right password so that they can go on. If they don't get the password right they end up back at the passage that asks for the password.
ALSO
I am trying to have the input come up by clicking a link. Once the player has gotten the password right, i want the link to be replaced by another link so that they won't need to retype the password everytime they come to this passage.

Here is what I have so far:

(set: $eno to (goto: "HOME"))\
(set: $adams to (goto: "John Adams"))\
(link: "PLAY")[(set: $password to (prompt: "Serial #:"))\
(if: $password is "secret")$adams,(else:)$eno]\