Customtext parameter

Requesting help on what is probably a noob user question.
My installation welcome message box does not display my custometext. Shouldnt it just be:
and if the XML file has the WelcomePrompt_CustomMessage set in all the languages it should just work?

Here is my configuration line:

Show Welcome Message, allow up to 1 deferrals, verify there is enough disk space to complete the install, and persist the prompt

	Show-InstallationWelcome -CustomText:$true -CheckDiskSpace -PersistPrompt

I have never used the -CustomText parameter before but it’s a switch so to use it just say -CustomText without the :$true

Like this:

	Show-InstallationWelcome -CustomText -CheckDiskSpace -PersistPrompt