[ccnet-user] System.Exception: Project Name is not valid on this TFS server

[Vaizo]

Hello
I try to connect with CC.NET to TFS 2008 with this configuration:

<cruisecontrol xmlns:cb="urn:ccnet.config.builder">
  <project name="ECBackup">
    <sourcecontrol type="vsts" autoGetSource="false">
      <server>http://tfs:8080</server>
      <project>$/TestovaciProjekt1</project>
      <workspace>TestovaciProjekt1</workspace>
    </sourcecontrol>

    <tasks>
      <msbuild>
        <executable>C:\WINDOWS\Microsoft.NET\Framework
\v3.5\MSBuild.exe</executable>
        <workingDirectory>D:\vyvoj\tfs2008\TestovaciProjekt1\</
workingDirectory>
        <projectFile>ECBackup.sln</projectFile>
         <buildArgs>/noconsolelogger /p:Configuration=Debug /v:diag</
buildArgs>
        <targets>Build</targets>
        <timeout>600</timeout>
        <logger>ThoughtWorks.CruiseControl.MsBuild.XmlLogger,C:
\Program Files\CruiseControl.NET\server
\ThoughtWorks.CruiseControl.MsBuild.dll</logger>
      </msbuild>
    </tasks>
  </project>

</cruisecontrol>

but it all the time throws this exception:
System.Exception: Project Name is not valid on this TFS server.

Please can you advice me what's wrong? What node in XML is project
name??

Thanks