Okay -
I have a web design client which hosts through GoDaddy. I need to create a password protected directory without having access to his account in GoDaddy.

This is what GoDaddy's help says:

To protect a directory in your hosting account with a password, in that directory, create an .htaccess file that contains the following:
AuthUserFile /home/content/l/o/g/login_name/html/.htpasswd
AuthGroupFile /dev/null
AuthName EnterPassword
AuthType Basic

require valid-user

Where "l," "o," and "g" are the first three letters of your hosting login and "login_name" is your full hosting login. For example, the hosting login "maynard" would translate to the following path:
/home/content/m/a/y/maynard/html/.htpasswd

The AuthUserFile describes where the Web server looks for the .htpasswd file. The .htpasswd file contains a list of users who have access to a protected directory and their hashed passwords. There are a number of tools available online to create .htpasswd files.
I have the .htaccess in directory: /presentations/debt_comp and have this in the path (with the correct login info entered):
/home/content/l/o/g/login_name/html/presentations/debt_comp/.htpasswd

This is what I have for the .htpasswd file:
guest:r91YIfI.laCMA

I get the prompt, but when I enter in the user name and password - it doesn't authorize.

Does anyone know what I am doing wrong?