Not able to Raise a Custom Event

Private Sub TimeQuery_SelectedTimeChanged(--)

added the handler :
AddHandler queryfield.SelectedTimeChanged, AddressOf TimeQuery_SelectedTimeChanged

in datepicker class

Public Custom Event SelectedTimeChanged As TimeSelectedChangedEventHandler
AddHandler(ByVal value As TimeSelectedChangedEventHandler)
[AddHandler](SelectedTimeChangedEvent, value)
End AddHandler
RaiseEvent(ByVal sender As Object, ByVal value As TimeSelectedChangedRoutedEventArgs)

End RaiseEvent
End Event
#End Region
so this is my code now in XAML file i have a datePickercontrol(Custom control) and when i change the date TimeQuery_SelectedTimeChanged method suppose to raise but cant raise it can anybody help me?
Thanks in advance
Shankar