IE Cannot display the webpage

Just realised one of my sites is not live. The other is fine.

I can publish it fine but when you enter the address in the address bar or click a Google link I get a message saying IE cannot display.

Is this a Yola issue? Strange how one site works and the other does not.

I have not made any changes for about 6 weeks to either site so don't think it is something I have done.

Only found out as checked web stats and they have been flat since mid April??????

Site not working is www.autopride.co.uk