I copied and followed everything as instructed.
But it's ok, I don't think it's your mod Blaze... It's 9.9.0 version that is causing the problem.
I just deleted all the files and dropped the database and reinstalled the software again, created the categories and subcategories... when I try to load the main category, it wont load, only sub-categories load.
I'm surprised no one has noticed this in their vanilla install.
It's not something to do with the .htaccess file, cos no matter if the value is set to one, or two for SE Friendly URLs, I still get the error.
Thanks for your help all the same Blaze, i appreciate it.