megamenu error

Dear sir, we purchase your megamenu before 2 days, yesterday we try to setup the megamenu at our project, we follow your instructions step by step as you describe to your sample. when we try to set submenu width at the menu item we get a fatal error from your module.

please check the error as we describe and give us a solution for this.
the error exactly as print in our error logs:

Fatal error: Call to a member function set() on a non-object in /home/*/public_html/projector-center/modules/mod_jux_megamenu/helper.php on line 734

thanks in advance

HI Aboutnet,
Thanks for contacting us and choosing our product!
Send me your account site via private message,please. I will check it for you
Thanks!

HI Aboutnet,
I'm sorry.I do not see the problem you say
I go to menus -> products -> Support -> tab parameters -> config Submenu Width:900
Thanks!