> I am sending the url to your email if that's ok?
Problem spotted: the server does not seems to like HEAD 
requests. Always use the correct URLs, especially with 
folders - that is, not <http://www.example.com/foobar> but 
<http://www.example.com/foobar/> (with terminating /)

Or you can also use:
'Set options'/'Spider'/'Force old HTTP/1.0 requests'

to avoid HEAD requests.