Module Manager Installation Issue

[denise006]

I am attempting to install the Simple SEO URL for Zencart but am having difficulties with the actual Module Manager. A while back I had to rename the admin directory in zen to admin1234 because of security issues. I therefore renamed the admin directory appropriately once I had downloaded the Module Manager installation files. I uploaded them onto my server and now when I go into Admin and attempt to use the Module Manager through tools I get the follow messgage "Warning: file(/home/safe006/public_html/admin1234includes/module_installation/install.sql) [function.file]: failed to open stream: No such file or directory in /home/safe006/public_html/admin1234/includes/classes/module_installer.php on line 201
Error Error: Nothing to do - no query or query-file specified.
Error Failed to set up version tracker table" Please help, am I doing something very wrong? All the files appear to be in place on the server but I cannot see what is wrong.