Silverlight ListBox does not scroll on mouse wheel movement on Mac

I have Silverlight based web app where. I found the ListBox doesn't scroll on mouse wheel scroll. I am able to scroll by clicking vertical scroll bar. When I use mouse wheel or 2 finger scroll it doesn't work. Here in Mouse Wheel scroll in List box 2 is working fine but ListBox 1 it does not work.

ListBox 1   

<Border CornerRadius="6,6,0,0" Grid.Row="1" Margin="2,5,2,0" BorderThickness="1,1,1,0" BorderBrush="#FFC4C4C4"><Grid><ListBox x:Name="filterListBox" Grid.Row="0" Grid.Column="1" Background="Transparent" SelectedIndex="{Binding SelectedFilterIndex, Mode=TwoWay}"  SelectedItem="{Binding SelectedFilterItem, Mode=TwoWay}" SelectionChanged="ListBox_SelectionChanged"  BorderThickness="0" VerticalAlignment="Center" Margin="5,3" ItemContainerStyle="{StaticResource FilterListBoxItemStyle}"><i:Interaction.Triggers><i:EventTrigger EventName="SelectionChanged"><ei:CallMethodAction TargetObject="{Binding}" MethodName="FilterSelectionChanged"/></i:EventTrigger></i:Interaction.Triggers><ListBox.ItemsPanel><ItemsPanelTemplate><StackPanel Orientation="Horizontal"/></ItemsPanelTemplate></ListBox.ItemsPanel><ListBoxItem Padding="7,2" VerticalContentAlignment="Center" Tag="Popular" Visibility="{Binding Path=IsPopularChannelTab, Mode=TwoWay, Converter={StaticResource BoolToVisibilityConverter}}"><TextBlock Text="{Binding Path=PopularChannelsText, Source={StaticResource PageStrings}}" FontSize="13" FontWeight="SemiBold" FontFamily="Arial" VerticalAlignment="Center" /></ListBoxItem><ListBoxItem  IsEnabled="False" VerticalContentAlignment="Center" Visibility="{Binding Path=IsPopularChannelTab, Mode=TwoWay, Converter={StaticResource BoolToVisibilityConverter}}"><StackPanel Orientation="Horizontal"><Border BorderBrush="#FFBDBDBD" BorderThickness="0,2,2,2" HorizontalAlignment="Center" VerticalAlignment="Center" Height="20"/><Border BorderBrush="#FFF8F8F8" BorderThickness="0,2,2,2" HorizontalAlignment="Center" VerticalAlignment="Center" Height="20"/></StackPanel></ListBoxItem><ListBoxItem Padding="7,2" VerticalContentAlignment="Center" Tag="All"><TextBlock Text="{Binding Path=AllChannelsText, Source={StaticResource PageStrings}}" FontSize="12" FontWeight="SemiBold" FontFamily="Arial" VerticalAlignment="Center"/></ListBoxItem><ListBoxItem  IsEnabled="False" VerticalContentAlignment="Center"><StackPanel Orientation="Horizontal"><Border BorderBrush="#FFBDBDBD" BorderThickness="0,2,2,2" HorizontalAlignment="Center" VerticalAlignment="Center"  Height="20"/><Border BorderBrush="#FFF8F8F8" BorderThickness="0,2,2,2" HorizontalAlignment="Center" VerticalAlignment="Center" Height="20"/></StackPanel></ListBoxItem><ListBoxItem Padding="7,2" VerticalContentAlignment="Center" Tag="Favorites"><TextBlock Text="{Binding Path=FavoritesText, Source={StaticResource PageStrings}}" FontSize="13" FontWeight="SemiBold" FontFamily="Arial" VerticalAlignment="Center"/></ListBoxItem></ListBox></Grid></Border>  

ListBox 2

<Grid Visibility="{Binding Path=IsHavingProvider, Converter={StaticResource BoolToVisibilityConverter}}" Margin="0,20,0,0" Grid.Row="4"><Grid.RowDefinitions><RowDefinition Height="18"/><RowDefinition Height="auto"/></Grid.RowDefinitions><core:MagicTextBlock Grid.Row="0" TextBlockStyle="{StaticResource TextBlock_Style}" Text="{Binding Path=Activity, Source={StaticResource PageStrings}}" /><ListBox Margin="0,10,0,0" Grid.Row="1"  x:Name="Provider" Width="480" Height="195" HorizontalAlignment="Left"  ScrollViewer.HorizontalScrollBarVisibility="Disabled"
                    ItemsSource="{Binding Providers,Mode=TwoWay}"
                    SelectedItem="{Binding SelectedProvider,Mode=TwoWay}"
                    ItemContainerStyle="{StaticResource Table_ListBoxItem_Style}"
                    DisplayMemberPath="name"></ListBox></Grid>