[Plugin: WP Calendar] Problems activating plug in

When activating this plugin I get the following message

Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 122880 bytes) in /var/www/vhosts/westkapelle-info.nl/httpdocs/wp-admin/includes/upgrade.php on line 729

Anybody got a solution?

http://wordpress.org/extend/plugins/wp-calendar/