The FolderOptions field must contain the value or default value 1 or 2.
"1" (Prompts user to choose folder)
This value prompts the user with the "Move to Folder" dialog box. Selecting a folder and clicking Add puts the new document in a folder. Selecting Cancel saves the document without putting it in a folder.
"2" (Save to current folder)
If the user is creating the document from an open folder, this value saves and adds the document to that folder. If the user is not creating the document from a folder, the document is saved but not added to a folder.