How to remove horizontal scroll bar of FCKeditor?

$oFCKeditor = new FCKeditor('FCKeditor1') ;
$oFCKeditor->BasePath = '../editor/';
$oFCKeditor->Value = 'test';
$oFCKeditor->Width  = '100%' ;
$oFCKeditor->Height = '450' ;
$oFCKeditor->Config['AutoDetectLanguage'] = false ;
$oFCKeditor->Config['DefaultLanguage'] = 'en ;
$oFCKeditor->Create() ;