Multi Project Solution Template

I am creating a multi-project solution template with a web application, Desktop, several class libraries and unit test.

I built the main container and packaged it as a VSIX container. When I install the VSIX container, I can .zip my solution template file on the following physical path

% AppData% \ Local \ Microsoft \ VisualStudio \ 11.0 \ Extensions \ tbxs0hui.w2e \ ProjectTemplates \ CSharp \ 1033 \ myprojecttemplate.zip, so everything is fine.

But when I start Visual Studio 2012, I could not see the template for my solution specified in the section "New Project → Visual C #".

When am I wrong? Any suggestions?

Here is the contents of Multisolution RootTemplate.vstemplate:

<?xml version="1.0" encoding="utf-8"?>
<VSTemplate Version="3.0.0" Type="ProjectGroup" xmlns="http://schemas.microsoft.com/developer/vstemplate/2005" xmlns:sdk="http://schemas.microsoft.com/developer/vstemplate-sdkextension/2010">
<TemplateData>
<Name>MultiProject</Name>
<Description>MultiProject</Description>
<Icon>MultiProject.ico</Icon>
<ProjectType>CSharp</ProjectType>
<RequiredFrameworkVersion>2.0</RequiredFrameworkVersion>
<SortOrder>1000</SortOrder>
<TemplateID>bbd7217a-8572-4edc-80ce-488cb9a347df</TemplateID>
<CreateNewFolder>true</CreateNewFolder>
<DefaultName>MultiProject</DefaultName>
<ProvideDefaultName>true</ProvideDefaultName>
</TemplateData>
<TemplateContent>    
<ProjectCollection>
<SolutionFolder Name="FolderName1">
  <SolutionFolder Name="FolderName2">
    <ProjectTemplateLink ProjectName="xxxxx">Children\Application1\Application1.vstemplate</ProjectTemplateLink>
    <ProjectTemplateLink ProjectName="yyyy">Children\Application1\Application2.vstemplate</ProjectTemplateLink>        
  </SolutionFolder>
  <SolutionFolder Name="Folder3">
    <ProjectTemplateLink ProjectName="zzzzzz">Children\Application3\Application3.vstemplate</ProjectTemplateLink>
  </SolutionFolder>
  <SolutionFolder Name="Web">
    <ProjectTemplateLink ProjectName="Web">Children\Web\Web.vstemplate</ProjectTemplateLink>
  </SolutionFolder>
</SolutionFolder>    
<SolutionFolder Name="Tests">      
    <ProjectTemplateLink ProjectName="xxxxxTest">Children\ApplicationxxxxUnitTest\ApplicationxxxxUnitTest.vstemplate</ProjectTemplateLink>
<ProjectTemplateLink ProjectName="yyyyyTest">Children\ApplicationyyyyUnitTest\ApplicationyyyyUnitTest.vstemplate</ProjectTemplateLink>
<ProjectTemplateLink ProjectName="zzzzzTest">Children\ApplicationzzzzUnitTest\ApplicationzzzzUnitTest.vstemplate</ProjectTemplateLink>
<ProjectTemplateLink ProjectName="WebTest">Children\ApplicationWebUnitTest\ApplicationWebUnitTest.vstemplate</ProjectTemplateLink>
</SolutionFolder>   
</ProjectCollection>
</TemplateContent>
</VSTemplate>

VSIX "MultiProject" VS2012. , "" . "" vstemplate, , unit test ProjectTypeGuid {3AC096D0-A1C2-E12C-1390-A8335801FDAB}; {FAE04EC0-301F-11D3-BF4B-00C04F79EFBC} "" .