If you are still having problems…
Have you made sure that CB8 is looking to the same (or correct) folder? Check it as follows:
Go to Devices > Plug-in Manager. You can then click on each plug-in on the “VST Effects” and “VST Instrument” pages to see it’s path in the bottom half of the screen called “Plug-in Information” (the italic “I” icon at the bottom must be pressed to see the paths). You can also see a list of the VST2 plug-in paths by changing the settings for the “Plug-in Information” section by clicking on the “gear” icon at the bottom.
Regards 