xml class not found in xml helper in cakephp

[xman]

im getting this error:\[code\]Fatal error: Class 'Xml' not found in C:\xampp\htdocs\wifidrivescanportal\app\View\Helper\XmlHelper.php on line 88\[/code\]What I did is I imported the library XML class in my XML helper via these line of code:XmlHelper.php\[code\]App::import('Core', array('Xml', 'Set'));\[/code\]But still I get the same error. I have my xml library stored in this path:\[code\]C:\xampp\htdocs\wifidrivescanportal\app\Lib\xml.php\[/code\]BTW, inside my xml.php, ive checked that it is this class that exists:\[code\]class XmlNode extends Object {// ....}\[/code\]Well, to make the story short, I need to utilize "serialize" of xml in cakephp. Dunno if im doing this right in the first place. Thanks for the help in advanced.** Edit **Ive also tried importing XML in my controller:\[code\]App::import('Xml');\[/code\]yet still in the same situation