How to make a iisApp package parameterized so that a deployed application is referenced to a given application pool?

Does anybody know how to make a iisApp package parameterized so that a deployed application is referenced to a given application pool in a setParamFile?

I tried many things, please help!

Below a simplified part of our deployment script

Command to create a package: 

MSDeploy -verb:sync -source:iisApp="WSVecozo/App/Autorisatie" -dest:package="%RepositoryPath%\WWW\iisApp.FEAutorisatie.1.0.0.0.zip" -declareParamFile="%TemplatePath%\Dpf.iisApp.tplIisAPP.1.0.0.0.xml"

Content of  the declareParamFile "Dpf.iisApp.tplIisAPP.1.0.0.0.xml"

<parameters>
 <parameter name="providerPath" description="providerPath" defaultValue="NoProviderPath">
  <parameterEntry type="providerPath" scope="iisApp" />
 </parameter>
 <parameter name="applicationPool" description="Name of applicationPool" defaultValue="">
  <parameterEntry type="DeploymentObjectAttribute" scope="iisApp" match="//@applicationPool"/>
 </parameter>
</parameters> 

Bold part is not working?

Command to install a package:

MSDeploy -verb:sync -source:Package="%RepositoryPath%\WWW\iisApp.FEAutorisatie.1.0.0.0.zip" -dest:auto -setParamFile="%RepositoryPath%\WWW\Spf.iisApp.FEAutorisatie.1.0.0.0.TST.AppAutorisatie.1.0.0.0.xml"

Content of  the setParamFile "Dpf.iisApp.tplIisAPP.1.0.0.0.xml"

<parameters>
 <setParameter name="providerPath" value="WSVecozo/app/Autorisatie" />
 <setParameter name="applicationPool" value="FEAutorisatie" />
</parameters>