After uploading all the files to our server, creating both configure.php filse, then changing all the permissions.... I get the following message when opening up /zc_install in Internet Explorer...

"Fatal error: Class messagestack: Cannot inherit from undefined class tablebox in /nfs/cust/0/63/48/684360/web/zencart/zc_install/includes/classes/message_stack.php on line 11"

I'm new to all of this and am clueless what to do. I've verified that my host company is capable of hosting zen cart and that all versions are up to date. I've also verified that all files were successfully uploaded during ftp transfer.

Anyone have a suggestion?