CMXpress: Installation Error!

We're sorry to say that CMXpress has not been installed correctly: The $SiteDir and $SiteURL paths do not currently point to CMXpress's directory. These two variables must be correctly configured, or CMXpress cannot run.

(CMXpress expects $SiteURL to start with "http:" or "https:", and expects $SiteDir/sys/cmxpress.php to exist. One of these was not true, so CMXpress is now aborting.)

This error cannot be corrected automatically. Please check your configuration settings in "config.php" to see if they are valid, and, if necessary, run "install.php" again.