I have created several forms that have been uploaded to a secure website. I have been doing this for 4 years now. A few months ago I started having trouble, a form will let users fill in the fields and submit them by using a submit button I placed on the form but, after several uses the form will lock users out of any field. The only thing I have found that works is for me to recreate the form from scratch and upload the new form, which works for a while and then also "quits." The forms are created in Adobe Pro v. 8 and are Reader Enabled. Does anyone have any ideas why this might be occurring?