[Plugin: WP e-Commerce] Adding variations to a products deletes all products!

Everytime i add variations to a product it goes to a svreen saying ‘are you sure you want to do this?’…then it goes to an error page…and ALL products are deleted?!? This happens everytime i add the variations to a product

Urgently need to get this fixed please, any ideas?

http://wordpress.org/extend/plugins/wp-e-commerce/