menu attach block not working for mega menu

I need to add a block inside the mega menu in drupal 7. I have installed menu attach block module in drupal 7. after installing it i attached a block to a main menu item, but the attached block, i am not able to see when the cursor is hover above the main menu item. Can anyone help menu how to add a view or a block to the existing mega menu item either by using menu attach block or any other module .