Vhosts Plesk 12.5.30 not working

Dear Experts,

I have a question (googled and searched this forum extensively) regarding hosting multiple websites on my plesk server. I'm using Plesk version 12.5.30 Update #55. I'm trying to run multiple websites on my plesk server which internally uses vhosts of apache but somehow the server doesn't seem to respond and only shows the default webpage of plesk. When I change the default page to the website it works fine (but I can only host one website).

The strange thing is that I tried...

Vhosts Plesk 12.5.30 not working