| Where is this feature?|
|1. ||Log In|
|2. ||Cart Settings|
|3. ||Payment/Gateway Settings|
|4. ||Payment Gateway Configuration|
Login to https://manager.paypal.com
Click on "Service Settings"
Make sure that either all your IP addresses are blank. So that Payflow accepts payments from anywhere, or that you have "126.96.36.199" listed so that the shopping cart can process funds.
If your still having connection problems contact PayPal Payflow Pro support 888-883-9770