Simple Menu disappear on Tabbed Panel pages

Hello,

I have simple menu installed since a few weeks, and I love it, but Recently, I have installed Panels 2 and the following modules :
> Panel Tabs : http://drupal.org/project/panels_tabs
> Javascript Tools : http://drupal.org/project/jstools (required for Panel Tabs)

No problem after the install, but if I insert a tabbed panel in a page, the Simple Menu disappear on this page (simple menu works out of this page).
I get the following error in the Javascript Console.
Error : $("a[@href*=\"" + fragment + "\"]").parent().parent().parent().attr("id") is null
Source File : /modules/panels_tabs/panels_tabs.js
Ligne : 72

I know that is a Panel tabs error, but Tabs works fine, only Simple Menu is impacted.
Do you have an Idea ? (I don't have JQuery_Update module)

Best Regards,