Error with Header(location:)

Denness

This is the error I get

Warning: Cannot modify header information - headers already sent by (output started at C:\Inetpub\wwwroot\PHP\loggedin.php:3) in C:\Inetpub\wwwroot\PHP\loggedin.php on line 14

for the following code (beginnig part)

<html>
<head>
<?
$username=$POST["txtName"];
$password=$POST["txtPass"];
$link = ODBC_connect("sixs", "", "");
//mssql_select_db("MyDB", $link);
$SQL = "SELECT E_D, E_C, E_N, E_P FROM T_E_HEADER WHERE E_C = '$username'";
$rs = ODBC_exec($link, $SQL);
$row = ODBC_fetch_row($rs);
if ($row=="")
{
Header("Location: http://localhost/PHP/sigmaphp.php?");
/Header("Location: [url]http://[/url]".
$SERVER['HTTP_HOST'].dirname($SERVER['PHP_SELF']).
"/sigmaphp.php"); /
exit;
}
else
{
$SESSION["Name"] = ODBC_result($rs,"E_N");
$SESSION["Department"]=ODBC_result($rs,"E_D");

The error appeared after I introduced the lines for redirecting the user to another page using header (Location:______)

Please help or advise if you need me to advise anything more

Thanks

laserlight

Well, on lines 1 and 2 you wrote html tags which were output.

Headers cannot be sent after output has been written, so you should either write those tags after the header(), or use output buffering.

Denness

Thanks a million!.

I shifted the First two line after the header() and it worked.