MySQL & PHP Question

Okay

I have a Members feature on my Community System, when you click a member it returns as only the members name, not any of the other members.

But I want it to when clicked to display some information from a MySQL Database

Iv tried this code but it doesn't display anything!!

<!-- Copyright Jacob Clark 2010 | Fusion Strike Studios and Network -->

<!-- Fusion Strike; Live! Was Developed In Loving Memory Of Frederick Clark -->

<!-- Please Do Not Remove These Comments -->


<?php 

include "config.php";

?>



<html>

<head>

<title>Fusion Strike; Live!</title>

<link rel="stylesheet" href="style.css" type="text/css" >

</head>

<body>

<img src="images/logo.png">

<br>

<div id="page-wrap">


	<h4>

		<?php include "bloginfo.php"; ?>

	

	</h4>


<h6>


	<?php include "navigation.php"; ?></div></h6>


<div id="page-wrap">

	

	<?php

	//Defines the function that will allow us to display only one post on click

	

	function get_content($id = '') {


	//Gets the ID number from the SQL Database

	if($id !=""):

		$id = mysql_real_escape_string($id);

		$sql = "SELECT * FROM regusers where id = '$id'";

	else:

		//If we dont specifiy an ID display everything

		$sql = "SELECT * FROM regusers ";

	endif;

	//If there was an error display it

	$res = mysql_query($sql) or die(mysql_error());

	

	//This IF statment decides wether the ID tag you have enterd exists or not, if it does it

	//displays the post, if it doesnt it displays an error message

	

	if(mysql_num_rows($res) != 0):

	

	//How to display the posts

	while($row = mysql_fetch_assoc($res)) {

		//Makes posts titles into links

		echo '<p><a href="members.php?id=' . $row['id'] . '">' . $row['username'] . '</a></p>';

		

	}

	

	else:

		echo '<p>Oh Dear, This Is Embarrassing, It seems we cant find what your looking for!</p>';

	endif;

	

	


	

	}

	

//Ends Our Class


//Displays the posts

	if(isset($_GET['id'])):

		get_content($_GET['id']);

		$id = ($_GET['id']);

		

		$sql = "SELECT * FROM regusers where aboutme = '$id'";

		$res = mysql_query($sql) or die(mysql_error());

		$row = mysql_fetch_assoc($res)or die(mysql_error());

		echo $row['aboutme'];

		

		

		

		else: 

			get_content();

	$result = mysql_query("SELECT * FROM regusers");

	$num_rows = mysql_num_rows($result);

	echo "<h6>We have <b>$num_rows</b> registerd members</h6>";




			endif;

	?>

	

	

</div>

<br>	

		<?php include "footer.php"; ?>

Anybody got any ideas?

Thanks!!!!