[TYPO3] adding new function int pi Class

[Sancar Saran]

hi I'm trying to resolve things and get very interesting error

Here code

	function main($content,$conf)	{
		$this->conf=$conf;
		$this->pi_setPiVarDefaults();
		$this->pi_loadLL();
		$this->templateFileContent = 
$this->cObj->cObjGetSingle($this->conf['userFunc.']['altTemplateFile'],
$this->conf['userFunc.']['altTemplateFile.']);

		$GLOBALS["TSFE"]->set_no_cache();
		$GLOBALS['TSFE']->additionalHeaderData[$this->extKey] = '<script 
type="text/javascript" 
src="'.t3lib_extMgm::siteRelPath($this->extKey).'js/evoBase.js"></script>';


		// Include xaJax
		require (t3lib_extMgm::extPath('xajax') . 'class.tx_xajax.php');

		// Make the instance
		$this->xajax = t3lib_div::makeInstance('tx_xajax');

		// Decode form vars from utf8
		$this->xajax->decodeUTF8InputOn();

		// Encoding of the response to utf-8.
		$this->xajax->setCharEncoding('utf-8');

		// To prevent conflicts, prepend the extension prefix.
		$this->xajax->setWrapperPrefix($this->prefixId);

		// Do you want messages in the status bar?
		$this->xajax->statusMessagesOn();

		// Turn only on during testing
		$this->xajax->debugOff();

		// Register the names of the PHP functions you want to be able to call 
through xajax
		// 
$xajax->registerFunction(array('functionNameInJavascript',&$object,'methodName'));
		$this->xajax->registerFunction(array('TTTEst', &$this, 'TTTEst'));

		// If this is an xajax request call our registered function, send output and 
exit
		$this->xajax->processRequests();

		// Else create javacript and add it to the normal output
		$GLOBALS['TSFE']->additionalHeaderData[$this->prefixId] = 
$this->xajax->getJavascript(t3lib_extMgm::siteRelPath('xajax'));

		$content.= TTTEst();

		#$content.= ulVarDump($arrWData);
		return $this->pi_wrapInBaseClass($content);
	}// Main Function end

	function TTTEst()
	{
		return "hello world";
	}

Then I got this

Fatal error: Call to undefined function TTTEst() 
in /web/typo3/typo3conf/ext/evodot_wbscgi/pi2/class.tx_evodotwbscgi_pi2.php 
on line 102

Regards

Sancar