Setting up the module

I feel like I must be missing something basic here because I can create a node, set the password, log in as a different user, but don't see a way to enter in the password - it immediately displays a Access Denied error. I think I got the permissions right, but I'd like to get a sanity check.

I'm running drupal 6.2, mysql 5, and php 5. I did not upgrade my site from drupal 5.x nor did I have a prior version of protected node enabled.

This is the procedure I followed:
- downloaded and untarred protected_node-6.x-1.3.tar.gz into my sites/all/modules/ dir
- checked to see that Home > Administer > User management > Node Module: Access content was checked for anonymous and authorized users
- set permissions for content types (book page and blog) to protect under Home > Administer > Site configuration > Protected node
- created a new book page
- enabled node protection (checkbox) and entered in a password, saved book page
- used a second browser to first try to access the page anonymously as well as tried to login under a different account and access the page. With both, I got an Access Denied screen, and had no option to enter in a password.

What am I doing incorrectly?

Thanks in advance!