Unable to save shop information

[glendo]

I get an error: vmError: No valid image was loaded.
When I try to manage products I get: No Shop Currency defined! Go to http://our-families.org/horn2/administrator/index.php?option=com_virtuemart&view=user&task=editshop

I'm running Joomla 2.5 and the latest version of Virtuemart. I also searched the forums for this issue without success