Help needed, I cannot understand what to do!

<?php
//edit this array
$Alena_Holligan= array('name'=>'Alena Holligan','email'=>'alena.holligan@teamtreehouse.com');
$Dave_McFarland=array("name"=>'Dave McFarland',"email"=>'dave.mcfarland@teamtreehouse.com');
$Treasure_Porth=array("name"=>'Treasure Porth',"email"=>'treasure.porth@teamtreehouse.com');
$Andrew_Chalkley=array("name"=>'Andrew Chalkley',"email"=>'andrew.chalkley@teamtreehouse.com');
$contacts = array($Alena_Holligan, $Dave_McFarland, $Treasure_Porth, $Andrew_Chalkley);

echo "<ul>\n";
//$contacts[0] will return 'Alena Holligan' in our simple array of names.
echo "<li>".$contacts[0]['name']. ': '.$contacts[0]['email']."</li>"."\n";
echo "<li>".$contacts[1]['name']. ': '.$contacts[1]['email']."</li>"."\n";
echo "<li>".$contacts[2]['name']. ': '.$contacts[2]['email']."</li>"."\n";
echo "<li>".$contacts[3]['name']. ': '.$contacts[3]['email']."</li>"."\n";
echo "</ul>\n";

//Bellow is the hard coded output I have replaced with my lines above, the system fails me with the message 
//" Bummer! I do not see the required output. You should not be modifying the output at this point."
/*echo "<ul>\n";
//$contacts[0] will return 'Alena Holligan' in our simple array of names.
echo "<li>Alena Holligan : alena.holligan@teamtreehouse.com</li>\n";
echo "<li>Dave McFarland : dave.mcfarland@teamtreehouse.com</li>\n";
echo "<li>Treasure Porth : treasure.porth@teamtreehouse.com</li>\n";
echo "<li>Andrew Chalkley : andrew.chalkley@teamtreehouse.com</li>\n";
echo "</ul>\n";
*/