here a more detailed description of my problem:
as stated above, when created the form number 281, cforms let me duplicate/create new forms, although when clicking on "update settings", the new form wasn't saved and just disappeared in the admin section of cforms, neither did it display the new form in the dropdown menus.
the only error message after clicking update settings was this one:
It seems that you have recently upgraded cforms please check the new file upload/attachment relevant settings below! You can ignore the message if you're not using any file upload field(s).
…but there is no upload/attachment field in any of my forms.
I checked the abspath settings, but that seems to be working.
I thought that I solved the problem by backing up all cforms data, completely removing the cforms plugin (by clicking remove cforms under global settings). then I redownloaded cforms, installed a fresh copy and restored all settings which I exported before that.
Just then, it seemed to work adding/duplicate forms!! but unfortunately just up to form number 292. There it stopped working again, same problem as described above.
I contacted the webhoster (it's a shared hosting), but there don't seem to be any limitations on the database or anything similar that could cause this behaviour……
any idea how to solve this before my client starts chocking me?
cause i really still like to promote this plugin, cause it's got way superiour usability compared to others out there!