After moving my site to new host, I can't see my store, but only I can't log on my site, other can log on. (HELP!!!)

[vigor11]

Hello. Because of link eror, my site was broken. I don't know the reason. But forunately I backed up and could returned to site of serveral days ago. I lost some data but it is okay now with help from other person.

He moved my site to new host by installing new prestashop.

But the problem is I can't see my site
It says " Invalid load Configuration() SQL query "
I can't open my site from my computers. BUT I can open my site from other computer.
Only my computers can't open my site, saying "Invalid load Configuration()SQL query"

And sometimes some people are reporting temporarily they can't open site and only see error message above.
But if they "refresh site" they can see my store without any error.

It seems normal to other people. Just I can't open my site and even can't connet to my back office.
And some peopel can't open site for a monent but if they refresh site, they could see site.
Those error moment stay 1 second to several miniutes from other computer.

But all my compurters can't open my site all at. What happened?
Please help me.!

[tomerg3]

It may be related to your DNS cache, your browser may thing your site is still in the old server.

Try opening a windows command prompt (run "cmd"). and type

Ping www.yoursite.com

If the IP address is of the old site, type the following

ipconfig /flushdns

Now try again.