manifest creation using mt.exe unrecognized element requestedPrivi

I want to "mark" an exe with a requestedPrivilege level. I have created a
manifest <below>. My target machine is, of course, Vista. My development
machine is XP Pro. When I run my built from Visual Studio 2005 I get a
manifest warning.

I am wondering "where" the DTF file is or is it another mechanism that
doesn't have the entry for where does it actually get
urn:schemas-microsoft-com:asm.v2?
Any ideas how this works?

Here is the manifest
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

<assembly xmlns="urn:schemas-microsoft-com:asm.v2" manifestVersion="1.0">

<assemblyIdentity

version="1.0.0.0"

processorArchitecture="X86"

name="KofaxImageProducts.AscentCapture.QualityCont rol"

type="win32"

/>

<description>Ascent Capture - Quality Control</description>

<dependency>

<dependentAssembly>

<assemblyIdentity

type="win32"

name="Microsoft.Windows.Common-Controls"

version="6.0.0.0"

processorArchitecture="X86"

publicKeyToken="6595b64144ccf1df"

language="*"

/>

</dependentAssembly>

</dependency>

<ms_asmv2:trustInfo xmlns:ms_asmv2="urn:schemas-microsoft-com:asm.v2">
<ms_asmv2:security>
<ms_asmv2:requestedPrivileges>
<ms_asmv2:requestedExecutionLevel level="asInvoker">
</ms_asmv2:requestedExecutionLevel>
</ms_asmv2:requestedPrivileges>
</ms_asmv2:security>
</ms_asmv2:trustInfo>
</assembly>