The status of your system is being checked to ensure that all enabled features are available, that the mail server is properly configured, and that quotas are active ..
Mail server Sendmail is installed and configured. Apache is installed. Webalizer does not appear to be installed on your system, or has not yet been set up properly in Webmin's Webalizer Logfile Analysis module. If your system does not use Webalizer, it should be disabled in Virtualmin's module configuration page.
.. your system is not ready for use by Virtualmin.
Using GPL version, running CentOS5. I have tried disabling it but it doesn't change and just stays active.