WiX cannot validate property set using CustomAction

I want to include different dlls based on specific values ​​in the dll. So, I am trying to load a component based on a property that is set using a custom action.

In the wxs file:

...
<Property Id="PropDllVersion" Value="0" />
...
<CustomAction Id="CheckPropDllVersion" BinaryKey="CustomAction1.dll" DllEntry="GetPropVersion" Return="ignore" Execute="immediate"/>
...
<InstallExecuteSequence>
    <Custom Action="CheckPropDllVersion" After="ValidateProductID" />      
</InstallExecuteSequence>
...
  <Component Id="Test"
     Guid="B81F832D-2D96-4169-9BD0-8D77098FEC60">
    <Condition><![CDATA[PropDllVersion = "19"]]></Condition>
    <File Id="File15"
      Name="xyz.dll"
      Vital="yes"
      KeyPath="yes"
      AssemblyManifest="File5"
      AssemblyApplication="File5"
      Assembly=".net"
      DiskId="1" 
      />
  </Component>
...

Then in the user action file:

[CustomAction]
        public static ActionResult GetPropVersion(Session session)
        {
    session["PropDllVersion"] = "19";
        }

You can see in the msi log file that this property has been changed to 19, but the xyz.dll file is not included in the installation. It seems that PropDllVersion is not set at the condition level or something is wrong ... I tried to arrange it in many other places until it works ...

If I use a global property in a condition instead of my property, it works!