A bit more information.
With the new file from Terry.
I get the following javascript errors all apparently in CuteEditor.htc.aspx
Line 1131, Char 1 - Syntax Error
Line 6480, Char 2 - Object Expected
Line 6710, Char 2 - Object Expected
And much more frequent hanging with hourglass.
With the original file, no hanging and the same access denied error as above.
Hope that helps.
James