integrate ckfinder in ckeditor

I integrated the ckfinder into the ckeditor, but it's not working properly.
When I open the ckfinder I get the error message: access denied.

So I searched were the error occurs it happens in the ckfinder.html file when in this part of the file

if ( parentWindow['CKEDITOR'] )
{
     config.selectActionFunction = function( fileUrl, data )
     {
   parentWindow['CKEDITOR'].tools.callFunction( funcNum, fileUrl, data );
     };
     config.selectThumbnailActionFunction = config.selectActionFunction;
}
break;

Can somebody.. please.. help me