Paypal Pro Sandbox - How to

I am new to Hikashop and Paypal Sandbox.

I have Hikashop latest stable version 2.0.0
The extension is installed in joomla 2.5.7

I have configured the Paypal Pro Payment plugin with the username, password and signature of my PayPal Payments Pro Sandbox account which has API credentials.

I have a Paypal Sandbox Personal Account setup. I login to joomla and add products to the cart. On checkout the user is offered the option to pay by PayPal Pro method. I enter the card details and expiry date and select 'next'.

The user receives a message to thank them for their purchase. E-mails are sent to the joomla admin and the user confirming that an order has been placed.

At no time is the user directed to a Paypal Page or the paypal Sandbox page.

No funds are transfered from the Sandbox 'Buyer' Account to the Sandbox Merchant account.

I have products setup and can add them to the cart.

What am I doing wrong? I've followed the Hika Help and spent time trying to understand the Paypal Sandbox but is there a step by step guide anywhere on how to get these two running?

OK. So I decided to try the standard paypal plugin. This worked successfully in the sandbox.

I'll try the pro plugin again later