I have not made this jacket but you can get help over on Ravelry. There is forum called Zimmermaniacs. http://www.ravelry.com/groups/zimmermaniacs
Someone there will surely be able to help you.
Or go to www.Schoolhousepress.com
. Toward the bottom of the L hand column on the home page it tells you who to contact for technical help with any EZ or Meg Swansen pattern. Meg herself will answer your questions.