Hi guys, i need your help by ScrollView issue

Here you can see my code below.. Im not able to scroll vertically, what do i need to do to get this issue solved?

<?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="Intro_D.AnkunftKundeEWStepView">
<!--<ContentPage.Padding>
        <OnPlatform 
            x:TypeArguments="Thickness" 
            iOS="5,20,5,5" 
            Android="5,0,5,5" 
            WinPhone="5,0,5,5" />
</ContentPage.Padding>-->
<ContentPage.Content>
<ScrollView Orientation="Vertical">
     <StackLayout Orientation="Vertical">
            <TableView>
                <TableRoot>                
                    <TableSection Title="Wartezeit mit Berechnung">                                 
                        <SwitchCell Text="Kunde nicht erreichbar" x:Name="switchWaitingCusstNotAvailable" OnChanged="switchWaiting"/>
                        <SwitchCell Text="Kunde noch nicht da" x:Name="switchWaitingCustDelay" OnChanged="switchWaiting"/>
                        <SwitchCell Text="Abwicklung MV+MV" x:Name="switchMV" OnChanged="switchWaiting"/>
                        <EntryCell x:Name="entryCellSonstigesWartezeit"
                           Label="Sonstiges:"
                           Text=""
                           Placeholder="">                    
                        </EntryCell>
                    </TableSection>
                     <TableSection Title="Wartezeit ohne Berechnung">                                   
                        <SwitchCell Text="Zu früh beim Kunden" x:Name="switchWaitingNocount" OnChanged="switchWaitingNocountChanged"/>
                    </TableSection>
                    <TableSection Title="Abbruch">                    
                        <SwitchCell Text="Kunde nicht anwesend" x:Name="switchCancellingCustNotPresent" OnChanged="AbbruchZeitOnChanged"/>
                        <SwitchCell Text="Termin gecancelled" x:Name="switchAbbruchMeeetingCancelled" OnChanged="AbbruchZeitOnChanged"/>
                        <EntryCell x:Name="entryCellAbbruchZeit"
                           Label="Sontiges"
                           Text=""
                            Placeholder="Abbruch">                    
                        </EntryCell>
                    </TableSection>
                </TableRoot>
            </TableView>         
       </StackLayout>
    </ScrollView>
    </ContentPage.Content>
</ContentPage>