I migrated an SL 4 app to SL 5 app and migrated Infrigistics product to 2012. then something wrong with XamGrid. it is working fine in SL 4 with Infrigistics product to 2011.

Here is my case:

 A XamGrid with double clicked event to choose the selected row.

In SL 5, the popup with XamGrid has some problems:

1. Extremely slowly and the app looks like frozen

2. No response for click/double click on the XamGrid.

Here is my pseudo code:

 XamDialogWindow XDW = new XamDialogWindow() {IsModal=true};
 XDW.Content = new SearchLookUp();    //SearchLookUp include a XamGrid which load data from DB with wcf ria service
 ((Canvas)this.FindName("PopupBase")).Children.Add(XDW);
 XDW.ShowAndFocus();     

here is xaml for usercontrol SearchLookUp:

    <Grid x:Name="LayoutRoot" Background="White" VerticalAlignment="Stretch"  HorizontalAlignment="Left">
    <controlsToolkit:BusyIndicator HorizontalAlignment="Center" VerticalAlignment="Center" x:Name="busyIndicator" IsBusy="{Binding IsBusy}">
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="*" MinHeight="400" />
                    <RowDefinition Height="Auto" />
                </Grid.RowDefinitions>
                <view:SearchEngagerAdvance Grid.Row="0" x:Name="SearchEngagerAdvanceV" HorizontalAlignment="Stretch" DataContext="{Binding Filter,Mode=TwoWay}"/>
                <ig:XamGrid Grid.Row="1"
                          ItemsSource="{Binding DataList,Mode=TwoWay}"
                          RowSelectorClicked="xamGrid_RowSelectorClicked"
                          CellDoubleClicked="grdEngager_CellDoubleClicked"
              HorizontalAlignment="Stretch"
              VerticalAlignment="Stretch"
              AutoGenerateColumns="False" >
  <ig:XamGrid.RowSelectorSettings>
        <ig:RowSelectorSettings x:Name="rowSelectorSettings" Visibility="Visible" />
    </ig:XamGrid.RowSelectorSettings>
    <ig:XamGrid.FilteringSettings>
        <ig:FilteringSettings AllowFiltering="FilterRowTop" IsMouseActionEditingEnabled="SingleClick" />
    </ig:XamGrid.FilteringSettings>
    <ig:XamGrid.PagerSettings>
        <ig:PagerSettings AllowPaging="top"  Style="{StaticResource AmsPager}" />
    </ig:XamGrid.PagerSettings>
    <ig:XamGrid.ClipboardSettings>
        <ig:ClipboardSettings AllowCopy="True" AllowPaste="True"/>
    </ig:XamGrid.ClipboardSettings>
    <ig:XamGrid.SortingSettings>
        <ig:SortingSettings AllowMultipleColumnSorting="True" />
    </ig:XamGrid.SortingSettings>
    <ig:XamGrid.ColumnMovingSettings>
        <ig:ColumnMovingSettings AllowColumnMoving="Indicator"/>
    </ig:XamGrid.ColumnMovingSettings>
    <ig:XamGrid.SelectionSettings>
        <ig:SelectionSettings CellSelection="Multiple" ColumnSelection="Multiple" RowSelection="Multiple" CellClickAction="SelectRow" />
    </ig:XamGrid.SelectionSettings>
    <ig:XamGrid.ColumnChooserSettings>
        <ig:ColumnChooserSettings AllowHideColumnIcon="True" AllowHiddenColumnIndicator="True"></ig:ColumnChooserSettings>
    </ig:XamGrid.ColumnChooserSettings>
    <ig:XamGrid.ColumnResizingSettings>
        <ig:ColumnResizingSettings AllowColumnResizing="Indicator" AllowMultipleColumnResize="True" AllowCellAreaResizing="True" AllowDoubleClickToSize="True" />
    </ig:XamGrid.ColumnResizingSettings>
    <ig:XamGrid.ConditionalFormattingSettings>
        <ig:ConditionalFormattingSettings AllowConditionalFormatting="True" />
    </ig:XamGrid.ConditionalFormattingSettings>                     
                    <ig:XamGrid.Columns>
                    ......
                    </ig:XamGrid.Columns>
                </AMSCommon:AMSXamGridControl>
            </Grid>
        </controlsToolkit:BusyIndicator>
    </Grid>

How to resolve this problem?