I'm creating an online payment page to work with PayPal
Within the form, I have a return field specifying the return path.
This return field contains a dynamic variable.
When my page is sent to paypals Sandbox environment, paypal sends my page to the url specified in the 'return field'
However it doesn't contain any Paypal response codes.
When my page is sent to paypals live environment, the return url is augmented with the expected paypal return codes as expected.
What might be wrong with the SandBox environment that I need to know so I can test it properlly