ISP or Antivirus problem

Hi. I have a problem by trying to see a site I should administrate. It’s a chain of sites dedicated to the biggest fooball clubs in Europe and the guy who makes it made a new one with Manchester United, that should be mine.

The problem is that even though I can see the other sites witch are on the same host like mine, I can’t actually see mine. Every time I try to visit it, it says Address Not Found (I use Firefox) or it shows me the https://www.ask.com search page if I’m more insistent. I tried to see it with https://www.anonymouse.org and it worked so I tried with ping and traceroute, but it didn’t worked.

One morning I wanted to try again, and I was really really surprised because it actually worked this time, but since the next day, I can’t see it anymore. The site adress is not restricted from Control Panel, but somebody told me it may be the antivirus. I’m using Eset Smart Security and I disabled the Web Access Protection and the HTTP how I was told, but still it doesn’t work. Please very very much help me. I really need to see this site.

The site is https://manutd.footballclub.ro