absolutelayout into scrollview doesn't scroll

Hello, I got this in XAML.

<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="octatesttest.RootPage">
<ContentPage.Content>
<ScrollView>
<AbsoluteLayout HeightRequest="786">
<Image Source="homecontent.png" AbsoluteLayout.LayoutBounds="0,0,320,786"/>
</AbsoluteLayout>
</ScrollView>
</ContentPage.Content>
</ContentPage>

The heightrequest is bigger than most of the screen, but i cannot scroll with the scrollview.