Blog shows on plesk preview but not on actual domain

Please help, this is killing me … Why do I see my newly installed wp blog on site’s preview in Plesk (https://plesk.myhost.com:somenumber/sitepreview/http/mydomain.com/?previous_page=dom_ctrlbut), BUT not on the domain (mydomain.com) itself?? What do I need to do? What is causing it to show up on preview but not on the actual url?

I wrote to the guys and they say it’s working fine. After two days of uploading, erasing, installing, editing the settings and eth … I’m going frenzy. And yea, I’m a newbie … 🙁