[Plugin: User Activation Keys] Installation

I’m running WP mulitisite

Thank you so much for writing this plugin. I’m regularly presented with the challenge that my users never receive their activation email and so I would like to be able to activate them by hand.

Hopefully, I can get this working and have a handy tool for resolving user registration issues quickly.

I installed and activated “User Activation Keys” plugin then:

1. Upload ds_wp3_user_activation_keys.php to the /wp-content/mu-plugins/ directory
2. Delete or approve keys at SuperAdmin->”User Activation Keys” page

and got:
Fatal error: Cannot redeclare ds_uak_admin_page() (previously declared in /home/content/p/h/y/phylliserck/html/wp-content/mu-plugins/ds_wp3_user_activation_keys.php:25) in /home/content/p/h/y/phylliserck/html/wp-content/plugins/user-activation-keys/ds_wp3_user_activation_keys.php on line 28

What did I do wrong?

I have taken ds_wp3_user_activation_keys.php back out of /wp-content/mu-plugins/ directory for now to get my site back up and running for class tomorrow morning.

Thanks in advance for any help you can offer.
-Phyllis