Paypal Express Checkout Credentials not setup correctly

I have the following error:


Failure!

The PayPal Express Checkout credentials are not set up correctly for live production use.
array(0) {
}


The credentials are correct & am using the following setings:
Version: 1.2 (online status)
API Version: 60.0

    Enable PayPal Express Checkout
True

Seller Account


API Username
xxx-blank for security-xxx

API Password
xxx-blank for security-xxx

API Signature
xxx-blank for security-xxx

Transaction Server
Live

Transaction Method
Sale

PayPal Account Optional
False

PayPal Instant Update
True

PayPal Checkout Image
Static

Debug E-Mail Address


Payment Zone
--none--

Set Order Status
default

PayPal Transactions Order Status Level
PayPal [Transactions]

Sort order of display.
0

cURL Program Location
/usr/bin/curl

Could you please render any assistance.

Thank you.