[pmwiki-users] PTV on default page

[V.Krishn]

On default page (Main.HomePage)
http://<domain>/wiki/pmwiki.php
I have set a ptv (:test: text123:)

I am unable to use the PTV from config.php 
i.e by using PageTextVar($pagename,'test');
but on page http://<domain>/wiki/pmwiki.php?n=Main.HomePage
it is available.

I hope its not a bug ?

-- 
Regards.
V.Krishn