Http Header & SSL server

[Anon]

I'm trying to pass form data to the our Worldpay secure server and not having much luck.

Pasting the URL into a browser or making a hyperlink out of it works fine but when it's passed via Header the server at the other end isn't getting any data from it.

What am I missing??

$location = "https://select.worldpay.com/wcc/purchase/?instId=15340&cartId=$name&desc=Registration&amount=$cost&currency=GBP&testMode=100'";
}

Header("Location: $location");