Fatal error: Cannot redeclare class core_control_cron in /mnt/webh/e1/99/5127729

hi there,

i have an issues with the cron tasks tab… it shows an redaclaration error:
Fatal error: Cannot redeclare class core_control_cron in /mnt/webh/e1/99/51277299/htdocs/WordPress_01/wp-content/plugins/easy-automatic-newsletter/admin/ean_admin-cron-tasks.php on line 8

can u give me advise on how to solve this issue?

kind regards

ante

http://wordpress.org/extend/plugins/easy-automatic-newsletter/