ada masalah hendak include fail aplikasi.tanya/$nama.php dalam __construct, tapi dalam index() boleh

kawal_index

<?php

class Index extends Kawal 
{

	function __construct($nama) 
	{
		parent::__construct();
		Kebenaran::kawalMasuk();

		$this->papar->js = array(
			//'bootstrap.js',
			'bootstrap-datepicker.js',
			'bootstrap-datepicker.ms.js',
			//'bootstrap-editable.min.js',
			//'bootstrap-lightbox.js'
			'../../js/function.js',
			'../../js/pwd.js',
			'../../lightbox/js/lightbox-2.6.min.js',);
		$this->papar->css = array(
			'bootstrap-datepicker.css',
			'bootstrap-editable.css',
			'../../css/navbar.css',
			'../../css/style.css',
			'../../lightbox/css/lightbox.css',);		
		#semak
		//include 'aplikasi/tanya/'.$nama.'.php';
		if (class_exists($nama)) 
			echo '<br>class ' . $nama . ' wujud<br>';

		/*$this->soal = new $nama_Tanya();
		# masukkan tatasususunan dari Tanya
		$this->papar->tawaran = $this->soal->tawaran();
		$this->papar->terkini = $this->soal->terkini();
		$this->papar->terlaris = $this->soal->terlaris();
		$this->papar->daftarAkaun = $this->soal->daftarAhli();
		$this->papar->loginMasuk = $this->soal->loginAhli();
		//*/
		//echo '<pre>$this->soal->tawaran()->'; print_r($this->soal->tawaran()) . '</pre>';
		//echo '<pre>$this->papar->tawaran->'; print_r($this->papar->tawaran) . '</pre>';
		//echo '<pre>$this->tanya->loginAhli()->'; print_r($this->tanya->loginAhli()) . '</pre>';
		//echo '<pre>$this->papar->loginMasuk->'; print_r(Index_Tanya::loginAhli()) . '</pre>';
	}
	
	function index() 
	{
		# pergi papar kandungan
		//$this->papar->baca('index/gambar3'); // untuk twitter bootstrap
		//$this->papar->baca('index/index'); // untuk twitter bootstrap
		//$this->papar->baca('index/index', 1 ); // tanpa twitter bootstrap
		//$this->papar->baca('index/index', 'mobile');
	}

	function gambar() 
	{
		# masukkan tatasususunan dari Tanya
		# tak kan nak copy paste isytihar setiap kali fungsi/metod baru
		$this->papar->tawaran = $this->tanya->tawaran();
		$this->papar->terkini = $this->tanya->terkini();
		$this->papar->terlaris = $this->tanya->terlaris();
		$this->papar->daftarAkaun = $this->tanya->daftarAhli();
		$this->papar->loginMasuk = $this->tanya->loginAhli();

		# pergi papar kandungan
		//$this->papar->baca('index/gambar3'); // untuk twitter bootstrap
		//$this->papar->baca('index/index'); // untuk twitter bootstrap
		//$this->papar->baca('index/index', 1 ); // tanpa twitter bootstrap
		//$this->papar->baca('index/index', 'mobile');
	}

	//*/
}