I've worked with this with one form, and that was excellent, but used the copy functionality, twice, and all my forms stopped working. Unable to submit the forms, i looked at the tables, and the form fields had been deleted from the form elements table. started from scratch, repopulated the table, and weirdly, the elements were deleted :(
please upgrade to the latest version o BF. This has been fixed months ago.
Thanks & Regards,