silverlight integrated with asp not working - asp.net

Question

I have this problem in this scenario:
1-I made a new silverlight project with webapplication hosted the silverlight project.
2- when trying the silverlight project alone, it works very good with no errors.
3-but when trying the 'silverlighttestpage.aspx' the browser opens and a white page appears.and a the silverlight loading circle appears and after reaches 100% nothing is shown.
so can you please help me, I'm newbie in silverlight and asp,btw I have silverlight 4 sdk installed.
here is the html:
``
<div id="silverlightControlHost">
<object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%">
<param name="source" value="ClientBin/silverlighttest3.xap"/>
<param name="onError" value="onSilverlightError" />
<param name="background" value="white" />
<param name="minRuntimeVersion" value="4.0.50826.0" />
<param name="autoUpgrade" value="true" />
<a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=4.0.50826.0" style="text-decoration:none">
<img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="Get Microsoft Silverlight" style="border-style:none"/>
</a>
</object><iframe id="_sl_historyFrame" style="visibility:hidden;height:0px;width:0px;border:0px"></iframe></div>
</form>
and the silverlight project like this:
<UserControl x:Class="silverlighttest3.MainPage"
....
<Grid x:Name="LayoutRoot" Background="blue" Height="507" Width="842" HorizontalAlignment="Stretch">
<MultiScaleImage HorizontalAlignment="Left" Margin="146,27,0,0" Name="multiScaleImage1" VerticalAlignment="Top" Source="Source/dzc_output.xml"/>
</Grid>
</UserControl>

Answer 1

Do you have any distinguishable content in your main view? Could you maybe post your html in your test page?
Give your Silverlight main view a background color (other than white) and make sure that it isn't just blending in with the white background of your empty test page.
<UserControl x:Class="SilverlightApplication2.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400">
<Grid x:Name="LayoutRoot" Background="Blue">
</Grid>
</UserControl>