yAxis title doesn´t work

I tried the example you put on this page, the chart displays right but I can´t change the yAxis title, it just show: "Y-values".

this is my code:

{{{

!php

$options = array( 'chart' => array( 'renderTo' => 'my_graph', 'defaultSeriesType' => 'area' ), 'title' => array( 'text' => 'Gasto m3/seg ' ), 'xAxis' => array( 'categories' => $d1, 'title' => 'Horas' ),

                    'yAxis' => array(
                        'title' => array(
                            'text' => 'My Values'
                        ),
                    ),

                     'series' => array(
                                       array(
                                             'name' => 'Gasto',
                                             'data' => $d1
                                             ),
                                       array(
                                             'name' => 'Volumen',
                                             'data' => $d2
                                             )
                                       )
                     );

}}}

do you know how to fix this?

thank you

Has anyone addressed these issues on their own ? I am experiencing the same issues.

hmcfdb say:

I fixed this and it is running good.:

  private function build_option($key, $options)
  {
    $code = $key . ': ';
    if (!is_array(reset($options)))
      $code .= $this->build_properties($options);
    else
      {
        if ($key != 'series') {
        		$code .= '{';
        		if (is_array($options)) {
       		   foreach ($options as $k => $v){
        		      $code .= $k.': ';
        		   }
        		}
        } else {
        $code .= '[';
        }
        $opts = array();
        foreach ($options as $option)
          {
            $opts []= $this->build_properties($option);
          }
        $code .= implode(',', $opts);
        if ($key != 'series') {
        		$code .= '}';
        } else {
        $code .= ']';
        }
      }
    return $code;
  }