javascript/PHP error

Hi.

I have the following configuration on my php page.

For new pages I have this:

$oFCKeditor = new FCKeditor('FCKeditor2') ;
$oFCKeditor->BasePath = '../fck/' ;
$oFCKeditor->ToolbarSet = 'Default' ;
$oFCKeditor->Value = '' ;
$oFCKeditor->Create() ;

For old pages I have this:

$oFCKeditor = new FCKeditor('FCKeditor1') ;
$oFCKeditor->BasePath = '../fck/' ;
$oFCKeditor->ToolbarSet = 'Default' ;
$oFCKeditor->Value = $content ;
$oFCKeditor->Create() ;

The last one produces an error:

Error: FCKDialog is not defined
Source File: http://*SOMETHING*/fck/editor/js/fckedi ... gecko_2.js
Line: 48

why????