Payment processing error

[nickwiebe]

I'm getting this error message on my VirtueMart store that is on Joomla 2.5 and Virtumart 2.6.18

ERROR getOrderIdByOrderNumber: Authorize.net has returned the following order number  . We could not find this order.

called Authorize.net and they said it's Virtuemart problem...could use some help if anybody has ideas.

thanks