PHP : calling function from object in array

I have seens many posts about it but no real answer :(. My problem is the following :

I have the following Bean class :

<?php
class ResultBean {


private $_label;
private $_resultSet;
private $_headerSet;
private $_numRows = 0;
private $_numFields = 0;
private $_empty = TRUE;
private $_dataArray;
private $_headerArray;

public function __construct($label) {
    $v = trim($label);
    $this->_label = empty($label) ? "" : $v;

}

public function setResultSet($value) {

    if(!$value){
        $this->_resultSet = null;
        $this->_empty = TRUE;
    }else{
        $this->_resultSet = $value;
        $this->_empty = FALSE;
    }

    return $this;
}

public function getResultSet() {
    return $this->_resultSet;
}

public function getLabel() {
    return $this->_label;
}

public function setLabel($value) {
    $v = trim($value);
    $this->_label = empty($value) ? null : $v;
    return $this;

}

public function setHeaderSet($value) {
    $this->_headerSet = !$value ? null : $value;
    return $this;   
}

public function getHeaderSet() {
    return $this->_headerSet;
}

public function setNumRows($value) {
    $this->_numRows = $value;
    return $this;
}

public function getNumRows() {
    return $this->_numRows;
}

public function setNumFields($value) {
    $this->_numFields = $value;
    return $this;
}

public function getNumFields() {
    return $this->_numFields;
}

public function setDataArray($value) {
    $this->_dataArray = $value;
    return $this;
}

public function getDataArray() {
    return $this->_dataArray;
}

public function setHeaderArray($value) {
    $this->_headerArray = $value;
    return $this;   
}

public function getHeaderArray() {
    return $this->_headerArray;
}


public function getEmpty() {
    return $this->_empty;
}

public function __get($propertyName) {
    $method = 'get' . ucfirst($propertyName);
    if (!method_exists($this, $method)) {
        $method = 'is' . ucfirst($propertyName);
        if(!method_exists($this, $method)) {
            throw new Exception('Invalid read property ' . $propertyName . ' in ' . get_class($this) . ' class.');
        }
    }
    return $this->$method;
}

public function __isset($propertyName) {
    try {
        $_value = $this->__get($propertyName);
        return !empty($_value);
    } catch (Exception $e) {
        /* if a property isn't readable it isn't set*/
        return false;
    }
}

public function __set($propertyName, $value) {
    $method = 'set' . ucfirst($propertyName);
    if ('mapper' == $method || !method_exists($this, $method)) {
        throw new Exception('Invalid write property ' . $propertyName . ' in ' . get_class($this) . ' class.');
    }
    return $this->$method($value);
}



}
?>

In my index.php, I instantiate two beans :

$peopleBean = new ResultBean("Participants");
$countryBean = new ResultBean("Countries");

and would like to use them as following :

$beanArray[0] = $peopleBean;
$beanArray[1] = $countryBean;


for($i = 0; $i < 2; $i++){

    $resultArray = array();
    $bean = $beanArray[$i];

    echo "bean label :" . $bean->label . " <br/>";
    etc.

I get the following error message when loading my page :

Fatal error: Uncaught exception 'Exception' with message 'Invalid read property getLabel in ResultBean class.' in path/resultBean.php:103

Stack trace: #0 path/resultBean.php(106): ResultBean->__get('getLabel') #1 path/index.php(123): ResultBean->__get('label') #2 {main} thrown in path/resultBean.php on line 103

From all the pages I have read, it is not possible to use the java-style class-casting $bean = (ResultBean) $beanArray[$i].

How can I fix this ? Thank you =)

NOTE : I load the classes using an override of the __autoload() function and it works fine.

NOTE2 : I do make calls (outside of the array) like $peopleBean->numRows = *smthing*and it also seems to work.