multisite plugins problem

Hello Support,
I'm setting up a site and it was functioning ok. It is not public yet. I set up the multi-site this morning, and was able to set up the first sub site ok. Then, I needed to activate the plugins for the sites, and then started getting error messages, so nothing is working now. Here are the messages:

Warning: include_once(/home/leohar7/isisfbay.org/wp-content/plugins//functions.php) [function.include-once]: failed to open stream: No such file or directory in /home/leohar7/isisfbay.org/wp-content/plugins/wp_rokgallery/rokgallery.php on line 32

Warning: include_once() [function.include]: Failed opening '/home/leohar7/isisfbay.org/wp-content/plugins//functions.php' for inclusion (include_path='.:disappointed:usr/local/lib/php:disappointed:usr/local/php5/lib/pear') in /home/leohar7/isisfbay.org/wp-content/plugins/wp_rokgallery/rokgallery.php on line 32

Warning: include_once(/home/leohar7/isisfbay.org/wp-content/plugins//include.php) [function.include-once]: failed to open stream: No such file or directory in /home/leohar7/isisfbay.org/wp-content/plugins/wp_rokgallery/rokgallery.php on line 35

Warning: include_once() [function.include]: Failed opening '/home/leohar7/isisfbay.org/wp-content/plugins//include.php' for inclusion (include_path='.:disappointed:usr/local/lib/php:disappointed:usr/local/php5/lib/pear') in /home/leohar7/isisfbay.org/wp-content/plugins/wp_rokgallery/rokgallery.php on line 35

Fatal error: Call to undefined function rokgallery_set_admin_message() in /home/leohar7/isisfbay.org/wp-content/plugins/wp_rokgallery/rokgallery.php on line 36

Please advise.
Thank you,
Carol