Creating Forms (Text Fields)

I am using Class Room in a Book "Adobe Acrobat X ISBN-13 978-0-321-75125-6.

In lesson 10 page 253, I completed all the properties for the "Order_Start.pdf." when I entered data in the "price" and "quantity" the "total" for that line updated as usual; however, the "order total" would not update until its property box was opened and the "calculate tab" was opened and the "pick" tab was pressed and "field selection" box was opened and then all closed. (All total boxes are still selected) When the pdf was returned to the normal status, the "order total" updates.

I tried opening the file in Adobe Reader and it still didn’t work.

If I can get this to work, I will make tax work sheets with text fields from the pdf tax phamplet.

Am I missing a step