PayPal Express Button Not working

Using the same Website environment I am able to get Paypal express to work properly in the paypal sandbox environment but when I make the changes recommended to move to a Production Paypal site (i.e. changes code in checkout and pp_confirm + pointing to Production PayPal API Creditials) I return to the pp_checkout_failure page indicating I have bad API creditials. I know my creditials are correct because I used a HMTL code that PayPal gave me to valide my API Creditaials. I need help here since I do not see anything wrong. I have attached the pp_falure page where I capture the request and response and I have also added the HTML code that PayPal gave me to validate my creditials (which are valid).

I also attached the checkout and PP_ECO_PHP.php pages for your review.

Oh, one more thing....I have made quite a few changes to the checkout page and hope you can provide a fix without detroying any changes I have alreay made. It has taken me a long time to get to this point in my code....hope you will understand my concern.....

Thanks for your help!!!
John