Can't open existing file

[cpk]

Hello

I have done a lot of work creating a new web site and everything has been working fine for the last week. Worked on it again yesterday but today it won't open up and I get the attached messages. Help please. The site has been publised to test space on the web at http://www.intelligentbrochures.com/ruby2010. Any thoughts on what has gone wrong and how to recover it will be most welcomed.

Thanks
Charles