CubeCart 5/6 does not use the global.inc.php file to be told where it is anymore. CC5/6 does a really good job of figuring it out for itself. (However, if there are values in global.inc.php, CC5/6 will still use them.) You must give appropriate values to the Store Settings, SSL tab. If you didn't have SSL enabled, then these fields may already be blank. If not blank, blank them and save. Then log out. There are two ways to approach this: move the code, or adjust the hosting account parameters. M