Sorted! I already opened URL on another PC and it's all fine.
The strange thing is when I refreshed the page in IE9 it kept displaying the server error page. I still haven't managed to clear the cache although all browsing history and temp files have been deleted.
I have a problem with reverting to my original URL boulevard60.x10.mx
I created a sub-domain called ex-assist.elementfx.com then decided not to use it but now the URL is stuck on that and I'm unable to return to my original domain URL boulevard60.x10.mx I tried several times to change it but...