[RESOLVED] How can I solve this Header redirection issues?

[Benkud]

Hi,
I need help to figure out what I am doing wrong with header("location: page_to_load"). In local, the redirection works without problems. When I test online on a free server (p4o.net), it works fine; but when I test it on the paid server (mediaserve.com), the redirect loads a blank page.
After the blank page is loaded, I manually load the protected page (MyAccount.php) and all the information were displayed successfuly. I logged out and signed in with wrong credential. The result is a blank page. I manually loaded MyAccount.php again and I had "Access denied". I then concluded that the redirection deos not work. Is there any work arround for this situation? Please help.
Thanks

Login.php

<form  id="login" method="POST" action="handlers/login_handler.php">
	<strong>Username</strong>
	<input name="TextBoxEmailAdress" type="text" id="TextBoxEmailAddress" />
	<strong>Password</strong>
	<input name="TextBoxPassword" type="password" id="TextBoxPassword" />
	<input name="ButtonSubmit" value="Login" id="ButtonSubmit" type="submit" />
</form>

login_handler.php

<?php 
	ob_start();
	//Start session
	session_start();
	
	//Include database connection details
	require_once('../includes/WebConfig.php');
	
	//Array to store validation errors
	$errmsg_arr = array();
	
	//Validation error flag
	$errflag = false;
			
	//Function to sanitize values received from the form. Prevents SQL injection
	function clean($str) {
		$str = @trim($str);
		if(get_magic_quotes_gpc()) {
			$str = stripslashes($str);
		}
		return mysql_real_escape_string($str);
	}
	
	//Sanitize the POST values
	$Var_EmailAddress = clean($_POST['TextBoxEmailAddress']);
	$Var_Password1 = clean($_POST['TextBoxPassword']);
	
	//Input Validations
	if($Var_EmailAddress== '') {
		$errmsg_arr[] = 'Login ID missing';
		$errflag = true;
	}
	if($Var_Password1== '') {
		$errmsg_arr[] = 'Password missing';
		$errflag = true;
	}
	
	//If there are input validations, redirect back to the login form
	if($errflag) {
		$_SESSION['ERRMSG_ARR'] = $errmsg_arr;
		session_write_close();
		header("location: ../index.php?PageId=login");
		exit();
	}
	
	//Create query
	$Var_Password1 = md5($Var_Password1);
	$query="SELECT * FROM $tbl_member WHERE EmailAddress='$Var_EmailAddress' AND Password1='$Var_Password1'";
	$result=mysql_query($query);
	
	//Check whether the query was successful or not
	if($result) 
	{
		if(mysql_num_rows($result) == 1) 
		{
			//Login Successful
			session_regenerate_id();
			$member = mysql_fetch_assoc($result);
			$_SESSION['SESS_MEMBER_ID'] = $member['Member_Id'];
			$_SESSION['SESS_FIRST_NAME'] = $member['FirstName'];
			$_SESSION['SESS_LAST_NAME'] = $member['LastName'];
			$_SESSION['SESS_EMAIL_ADDRESS'] = $member['EmailAddress'];
			$_SESSION['SESS_ADMIN_ROLE'] = $member['AdminRole'];
			$_SESSION['SESS_CONTRIB_EMAIL'] = "";

			session_write_close();
			header("location: ../MyAccount.php");
			exit();
		}
		else 
		{
			//Login failed
			header("location: ../index.php?PageId=login-failed");
			exit();
		}
	}
	else 
	{
		//echo "mysql error: " .mysql_error();
		//echo "<br> mysql error number: " .mysql_errno();
		//die("Query failed");
		//Login failed
		header("location: ../index.php?PageId=login-failed");
	}
?>

[Benkud]

The problem was solved. There were blank line and space before and after the php tags.
Thanks to everyone.