Rad Grid Insert Command Not Firing

Hello,

Instead of using OnItemInserted try to wire InsertCommand and follow the help article below which elaborates on inserting values:
http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/data-editing/insert-records/inserting-values-using-inplace-and-editforms-modes

Additionally, after you are inserting values manually you should set AllowAutomaticInserts property to false.

Regards,
Pavlina
Telerik