I have created a virtual server, and have installed Joomla through "Install scripts" in virtualmin.

I find the site will allow me to use www.mydomain.com but not to login (If I try it reverts to mydomain.com). Also when I hit the home page. Alround it worhs with mydomain.com but want www.mydomain.com

I do not remember having this issue before, and wonder whether this issue is due to settings in .htaccess (which I do not really understand) or does my problem most likely lie elsewhere?