HTML Entities problem

As I know,when I input in editor, " will be converted to " , and ' will be converted to ',
but now the problem is ' won't be converted to '


I found files fckeditorcode_ie.js and fckeditorcode_gecko.js ,the codes

FCKTools.HTMLEncode=function(A){
if (!A) return '';
A=A.replace(/&/g,'&');
A=A.replace(/</g,'&lt;');
A=A.replace(/>/g,'&gt;');
A=A.replace(/'/g,'&#039;');
return A;
};

But it doesn't work
My editor version is 2.3.2,PHP version, what should I do,which file should I modify


Problem resolved,my project directory named with "_",when I rename the directory,the problem resolved