you issue is different.
You are probably using the X-Plus menu widget with the simple vertical menu type in the sidebar, which do not have the Current page styling.
If you choose the Vertical Accordion type for it, it will inherit the full styling.
If you need the simple vertical menu because you want all sub menus visible all the time, you can style the current page of the simple vertical menu with instruction in item #5 of this tutorial post
http://forum.weavertheme.com/discussion/10343/weaver-xtreme-tips-and-tutorial-part-2