php: failing when including a file that is defined in an array

I want to include a file, based on a value I get from my database. Inside class page in page.php I have this function to get the data I want :

function getPage(){
    $page=array(
      'title'=>$this->title,
        'content'=>$this->content,
        'module'=>$this->module
    );
    return $page;
}

And in pageview.php I call it like this : $elements=$page->getPage(); The function works just fine and I get my content , which I can manipulate like this for example(I know heredox is not the way to go but please ignore it, it's not the problem) :

 echo <<<EOT
    <div class='row-fluid'>
    <H1> title:$elements[title]</H1></br>
    $elements[content]
    $elements[module]
    </div>
EOT;

Now here comes the problem. I have a function called includeModule, which is like this :

function includeModule($page){

    $page=strtolower($page);

    if(file_exists("modules/".$page."php")) include("/modules/".$page."php");
    else Echo "No such Module Exists :".$page." </br>";

}

Now lets say I want to include a page named "tax.php". If I use include("/modules/tax.php)"; it works just fine. If I try though to use include("/modules/".$elements[module].".php)"; it does nothing ( an yes $elements[module] does contain only the word "tax" ). I even tried assigning the value of $elements[module] to another variable but nothing.

The strangest part of all is that if I try to use my function ( includeModule), even if I manually set the $page variable to "tax", it still doe not include anything and says that the file does not exist ( even though it does) ?

Any help on this ?

edit: i already tried removing the / but if i do it includes nothing again

edit: i've change the function a litle so i can get some feedback

if(file_exists("modules/".$page.".php")){
        echo "<p>file exists</p>";
        include("modules/".$page."**.**php");
    }else{
        echo getcwd();
         Echo "<p>No such Module Exists :".$page."</p>";
    }

OK solved. thanks for all the answers. By my mistake the trailing slash as well as the dot right before the php extension were left out . thanks for helping :)