Multidatatrigger does not work . Plz help

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WPF

<setter property="Template">
<setter.value>
<controltemplate targettype="{x:Type TextBox}">
<border x:name="Border" removed="White" borderthickness="{Binding<br mode=" hold=" /> Converter={StaticResource ResolutionHeightConverter},<br mode=" padding="0" cornerradius="{Binding<br mode=" borderbrush="#FF8F8F8F" xmlns:x="#unknown">
<microsoft_windows_themes:listboxchrome x:name="Bd" removed="{TemplateBinding Background}" snapstodevicepixels="true" borderthickness="{TemplateBinding BorderThickness}" xmlns:microsoft_windows_themes="#unknown">
<scrollviewer height="{Binding<br mode=" hold=" /> Converter={StaticResource ResolutionHeightConverter}, <br mode=" x:name="PART_ContentHost" verticalcontentalignment="Top" snapstodevicepixels="{TemplateBinding SnapsToDevicePixels}">


<controltemplate.triggers>

<multidatatrigger>
<multidatatrigger.conditions>
<condition binding="{Binding Text, RelativeSource={RelativeSource Self}}" value="">
<condition binding="{Binding IsKeyboardFocusWithin, RelativeSource={RelativeSource Self}}" value="False">

<multidatatrigger.setters>
<setter property="Text" value="Domain\UserName">
<setter property="Foreground" value="LightGray">



<multitrigger>
<multitrigger.conditions>
<condition property="IsEnabled" value="False">

<multitrigger.setters>
<setter property="Background" value="LightGray">
<setter property="Foreground" value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}">



<datatrigger binding="{Binding Path=IsError}" value="True">
<setter targetname="Border" property="BorderBrush" value="Red">
<setter targetname="Border" property="BorderThickness" value="2">
<setter property="ToolTip" value="{Binding UserMessage}">