All theme option for onepage theme is not saved

Hi,
I have a big problem of “theme option” .When I installed a premium theme OnePage, we can not change this theme option, you can enter it but if you click on “save”, it redirects directly to the website web only records without any changes. I’ve already update the DB but it does not change, I already use the recent version of WP, but it changes nothing.I already use ftp for uploading but it same.
I tell you that the problem exists only in the theme OnePage. I tested by other not OnePage theme and theme option works very well.
I await your solution.
Big thanks.

PS: Désolé, je suis nul en Anglais.