Pay to Register hack problem

[Mythotical]

I am creating a Pay to Register redirection hack but I got the code to work only problem is I get a bunch of characters show up on the do=addmember page.

Image of problem:

Here is the code I'm using at hook location register_addmember_complete

if ($_REQUEST['do'] == 'addmember')
{
echo ("<META HTTP-EQUIV=\"Refresh\" CONTENT=\"2; URL=payments.php\" />");
}

Here is alternate versions of the code:

{
echo ("<META HTTP-EQUIV=\"Refresh\" CONTENT=\"2; URL=payments.php\" />");
}

As you can tell I have tried everything that I thought would work. Help please, as I am stumped as to whats causing the problem that you see in the image above.

thanks
Steve