Sidebar Widgetized But Cannot Change

Hi folks,

I’m working with a particular site and the sidebar is widgetized and works without a problem. However, I have added the “Custom Sidebars” plugin and cannot replace the old sidebar with a new one that I have created. In the settings for the particular page, I can select the new side bar, but it does not appear. It only shows the old one.

Any thoughts as to where the problem lies? I can add widgets just fine and all appears to be working accept for when I hit update and nothing changes on that page.