AdaptiveTrigger not work UWP - xaml

Question

I have UWP app.
<GridView Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" x:Name="GridColections" IsItemClickEnabled="True" SelectionMode=" None " ItemsSource="{x:Bind DS.AllRem, Mode=OneWay}" ItemClick="GridColections_ItemClick" >
<VisualStateManager.VisualStateGroups>
<VisualStateGroup>
<VisualState x:Name="Small">
<VisualState.StateTriggers>
<AdaptiveTrigger MinWindowWidth="0" />
</VisualState.StateTriggers>
<VisualState.Setters>
<Setter Target="RemXML.Background" Value="Red" />
</VisualState.Setters>
</VisualState>
<VisualState x:Name="Middle">
<VisualState.StateTriggers>
<AdaptiveTrigger MinWindowWidth="400"/>
</VisualState.StateTriggers>
<VisualState.Setters>
<Setter Target="RemXML.Background" Value="Green"/>
</VisualState.Setters>
</VisualState>
<VisualState x:Name="Big">
<VisualState.StateTriggers>
<AdaptiveTrigger MinWindowWidth="500"/>
</VisualState.StateTriggers>
<VisualState.Setters>
<Setter Target="RemXML.Background" Value="Yellow"/>
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<GridView.ItemTemplate>
<DataTemplate x:DataType="local:GetRem">
<RelativePanel x:Name="RemXML" Width="345" Background="Cyan">
<TextBlock TextWrapping="Wrap" Text="{x:Bind ReminderName}" Margin="5,5,0,0" RelativePanel.AlignLeftWithPanel="True" FontSize="20" />
<TextBlock TextWrapping="Wrap" Text="{x:Bind ReminderDescription}" Margin="6,35,0,0" RelativePanel.AlignLeftWithPanel="True" FontSize="13.333"/>
<CheckBox RelativePanel.AlignRightWithPanel="True" Margin="100,0,-200,0" Width="220" RelativePanel.AlignVerticalCenterWithPanel="True">
<CheckBox.RenderTransform>
<CompositeTransform ScaleX="-1"/>
</CheckBox.RenderTransform>
</CheckBox>
</RelativePanel>
</DataTemplate>
</GridView.ItemTemplate>
</GridView>
So adaptive triggers don't work in my app. I need to change RelativePanel background. When Visual state I have in first control I have ERROR "An animation is trying to modify an object named 'RemXML', but no such object can be found in the Page." When Visual State I have in RelativePanel is don't work

Answer 1

Try putting the VisualStateManager inside of the DataTemplate which has a UserControl as top element.
<GridView.ItemTemplate>
<DataTemplate x:DataType="local:GetRem">
<UserControl>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup>
<VisualState x:Name="Small">
......
</VisualStateManager.VisualStateGroups>
<RelativePanel x:Name="RemXML" Width="345" Background="Cyan">