Settings JUX Mega Menu not saved!

I make changing settings JUX Mega Menu, next I press save. Appear message " settings are saved". But when I check design of Mega Menu on the my website - it still like before (it's start settings)! After installation JUX Mega Menu my website takes long to load. After installing the module has added the long empty space at the bottom of the page after the lowest element!
It's my website - http://www.grivelgroup.com/
Please help!

(Joomla! 2.5.28 Stable, VirtueMart 2.6.14 )

I found the solution!!! http://www.joomlaux.com/support/public-support/kb/article/can-not-save-module-20140515084606.html

Module must be save basic option to param attribute at module_table. And param attribute using type "text". And your product category have too many item. So when you save that, maybe your database overflow, then you can not save basic option.
So please change your type of param attribute to bigger type at module_table.