Error message when extending a supporter blog.

I am receiving the following error when attempting to modify a blog to extend blog supporter status. I am using the most current version of supporter and bp_group_calendar with Word Press 3.0. The extension seems to update ok, but the error is concerning.

Fatal error: Cannot redeclare bp_group_calendar_init() (previously declared in /home/iteworld/public_html/wp-content/plugins/bp-group-calendar/loader.php:30) in /home/iteworld/public_html/wp-content/plugins/bp-group-calendar/loader.php on line 31

Cheryl