Help help on fixing a plugin error

Hello Guys I am currently in need of help
I currenlty installed mytab but had this error pop up


Fatal error: Cannot redeclare mytabs_info() (previously declared in /home2/u2620412/public_html/inc/plugins/mytabs.php:27) in /home2/u2620412/public_html/admin/modules/forum/mytabs.php on line 35


If u are able to help me pm me or pm me for aim

DeActivate & Re-Activate it.