Event not getting updated under event handler section

Hi,

I have a custome component which does't have enhancement set.

now in this component i have created one button on overview page of this component, now for that button i am trying to create event it is asking enhnacementset...but this is custom component having Z.IMPL class..

i have created the event method EH_ONXXXX under this IMPL class and added this event in do_handle_event method also..but when i opened this component again...this event is not displayed under EVENT Handler section

pls help me on this. do i need to add this event any other place ??

Regards,

RV