Dave our support hours are Monday - Friday 9am - 5pm PST.
As for the error you are getting, it is occurring because the column in the order details table that is being used to store the ProductID is a numeric column.
to fix the error you will need to edit the OrderDetails table, change the data type for the product id column from int to varchar.
Then, open the confirm page, in the server behaviors panel, double click the eCart store Order Details behavior. Select the Product ID column and change the data type from number to text.