downloading BLOB from database using content-disposition [closed]

I have a small problem with the php content-disposition, I kind of understand where the problem lies but I have no idea how to solve it (new to using databases). Calling this php page will result in not showing any of the echos and only showing the download box, which I intended for the "cv" only (not sure if it's working that way, because the downloadable file I receive cannot be opened)

Removing the header(content... line will result in showing the echos, but I won't be able to download the specified file. I want it to show as a link which would download its contents when clicked.

$newEmployeeName = $_POST['name'];
$newEmployeeArea = $_POST['area'];
$newEmployeeCV   = $_POST['cv'];

include('databaseConnection.php');

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

while($row = mysql_fetch_array($result))
{
  $download_me = $row['cv'];
  header("Content-Disposition: attachment; filename=$download_me");

  echo $row['name'] . " " . $row['area_of_exp'] . " " . $download_me;
  echo "<br />";
}