Version Adobe Acrobat XI. OS Windows 7 Enterprise. I originally created a form in Forms Central. I added drop down list data in Adobe Acrobat. I distributed the file via e-mail. I received a completed form. However, when I tried to add the file to the response file, I see a progress dialog box but it never finishes. Consequently no data is populated in response file. Please advise if you have a solution to this issue. Thanks!!!