Looks like it's the prujem.cz domain that is the issue here. If we cant get to that, then changing whats written after the domain will not change matters. I also cannot get to "any" website from that link, or the updated link (posted above). Perhaps the domain is nolonger live, or it's hosted on a dynamic server... let us know when you can next get to it, and we'll try again.
Maybe is this a very slow server which is occupied
all the time.
Let wait a while to see what happens.
When a server is dead you get another message
I keep you posted