Dear Saad,
happy to know you. I have a big big problem with sending filled and finalized forms. The first ones were sent succesfuly, but not the others (I got error message about missing start columns). I think I have changed the sheet from a folder to another (I have changed position). I deleted all the files and folder from my Google Drive, and I left only the xml and google sheet of my questionnaire, it doesnt work. I would appreciate very much if yoy could help me on that. JAZAKA ALLAHOU KHAYR