That was not the issue
I checked and it is spelled/capitalized correctly. The plugin works on my local server, but when I moved it to a live server, it started kicking out that error. If you contact me directly or give me an email address, I will send you the live link.
Tested changing the folder from Plugins to plugins. The error was the same...
Warning: chdir() [function.chdir]: No error (errno 0) in \\boswinfs03\home\users\...\webassist\framework\framework.php on line 178
Framework file not found: Plugins/plug_menu_main.php
Need to try something else. Any ideas?