My ZC cart is pretty straightforward. I successfully installed the Categories Dressing add-on about 2 weeks ago. I also installed Easy Populate at the same time, seems to be working OK and appears on the Tools menu in the admin panel.

Recently, I tried to install Backup MySQL and Image Handler2. Neither plug works at all, and neither shows up in the Tools menu on the admin panel, nor in the Configuration menu in the admin panel.

I have checked the obvious file permissions. I am beginning to think that there may be a problem in my ZC installation somewhere that prevents me from installing ANY plug-ins.

Anyone have some troubleshooting ideas or ways to go about testing the ZC installation?