Joomla 2.5 Show Module only on K2 Category not on K2 item

I've assinged some modules to the category page but they also appear on the K2 item page.

I've tried Advanced Module Manager but it says it's not compatible with the module i was using so the Also on child item option doesn't work.

Any ideas?

i had same problem,and solved

create a hidden menu for each K2 item, in menu manager create a new menu (name it hidden) where it will not appear in any page, then at that hidden menu you can create a menu for each k2 item, and in module manger deselect that menus from menu assignment that solution worked for me as i didnt have much k2 items