Failed to assign property when adding new ApplicationBarMenuItem icon

I added a new button ApplicationBarMenuwith an icon on the page in my wp7 project. when I try to start the page, I get:

Failed to set property 'Microsoft.Phone.Shell.ApplicationBarIconButton.Click. [Line: 56 Position: 124]

Which points to a new menu item button that I added (second, send_report_button):

<phone:PhoneApplicationPage.ApplicationBar>
    <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
        <shell:ApplicationBarIconButton x:Name="take_photo_button" IconUri="/Images/appbar.feature.camera.rest.png" Text="Take photo" Click="TakePhotoClick" />
        <shell:ApplicationBarIconButton x:Name="send_report_button" IconUri="/Images/mail.sent.png" Text="Send report" Click="SendReportClick" />
        <shell:ApplicationBarIconButton x:Name="logout_button" IconUri="/Images/appbar.logout.rest.png" Text="Logout"/>
        <shell:ApplicationBar.MenuItems>
            <!--<shell:ApplicationBarMenuItem x:Name="menuItem1" Text="MenuItem 1"/>
            <shell:ApplicationBarMenuItem x:Name="menuItem2" Text="MenuItem 2"/>-->
        </shell:ApplicationBar.MenuItems>
    </shell:ApplicationBar>
</phone:PhoneApplicationPage.ApplicationBar>

I checked ten times that I have a method in .xaml.cs:

private void SendReportClick(object sender, RoutedEventArgs e)

But still VS does not seem to recognize it, otherwise something is wrong.

thank