I got the same message "Warning: Cannot modify header information"

[luis_24]

I'm having the same message "Warning: Cannot modify header information"

here is the souce code:

<?php

function REDIRECT()
{

// function begins here
$username= $POST[formusername];
$password= $POST[formpassword];

// check
if(strtolower($username== "test") && strtolower($password)=="123")
{
Header ("Location: images");

}

else
{
echo "Wrong Password";
}

}

REDIRECT();

?>

[stolzyboy]

make sure there is NO HTML OUTPUT, PHP ECHO'D HTML OUTPUT, WHITESPACE, COMMENTS, ANY OUTPUT TO THE BROWSER BEFORE TRYING TO DO A HEADER CALL.....