I tried a test on the remote server.
I deleted CssMenuwriter on my templates and the CssMenuWriter Directory then reinserted CssMenuWiter on my templates menus works fine on my localhost server but fails on the remote server in framework.
the only difference i can see is the versions of php I am using 5.3.10 and the remote on the Cpanel is showing 5.2.17
When l delete CssMenuWiter there is no problem on the site with FrameBuilder.
error with CssMenuWiter inserted on website
Test site: new_website/