Product Sort Order whit Warning: Invalid argument !!!

[goddis]

I try to setting product sort order by use creation date in default product sort order configuration.

When i choose creation date in default product sort order i get this warning in product layout. Warning: Invalid argument supplied for foreach() in /xxxxxxxx/xxxxx/xxxxxx/xxxxxx/public_html/plugins/vmcustom/stockable/stockable.php on line 229

Is anyone konw about this probleam? What can i do?

I see on this post http://forum.virtuemart.net/index.php?topic=113066.0 But, is not really like my probleam becuase i do not get Internal Server Error 500.

My website working but only on product layout page i get this warning to show up when i want to use sort order by creation date.

I just update  last VM version + Joomla 2.5

Before i update last Vm version. I never try to configuration sort product setting.

Sorry for my english and thank you for help.