SOLVED - SAGEPAY v3 / Single Click Payment

Hello to all.

New to the forum and to OpenCart.

I am in the process of migrating my website to opencart from another platform and want to use sagepay as a payment provider. I should be able to use the one-click payment feature offered by SAGEPAY for returning customers but have no idea how to configure it using the option in this module.

Payments are being accepted without issue but on returning I (the customer) still has to add card details.

OpenCart 1.5.6.4
SAGEPAY server v3

Many thanks
eclectictastes