blank page when configure a shiping or a pay metod (in backend)

[canalejas]

Hi all, (first sorry my poor English, i'm spanish  )
I intalled VM 2.0.22a in Joomla 2.5 recently at local PC (my Market is in construction) and don't work correctly when I configure a shiping or a Payment method in administration backend.  I define a payment method or shiping, assign a new name, plublish it, method PayPal f.ex and default group of buying people, and 1 in order list, SAVE correctly.... BUT the page of configuration apperas blank !!
Are the shipment and payment extensions no free? Or I heve anything wrong configurated?

Thank you and sorry my bad english !!!

[Maxim Pishnyak]

http://forum.virtuemart.net/index.php?topic=62675.0