Using Itextsharp to poulate a pdf document - not working when the pdf is a dynamic form

Question

I can populate the form when I have the pdf saved as a staic form, however some fields are dyanmic and changed based on the amount of data.  In order to accomplish that I have saved the pdf as a dynamic form, however my fields are now not populated when using itextsharp.
I have used Adobe Livecycle to create my forms