I've got a site on 5.7.3 using Paypal Express Checkout as the only payment option. I'm using the live api credentials and everything is working on my local and development servers, but when I moved to production, the authorization from Paypal never returns. The order goes through perfectly, appears from the customer side to work, but the charge never appears in Paypal for the buyer or seller and the order doesn't get marked as paid even though there is a note on the order stating "12/8/2010
Paypal Order Accepted With Paypal Order Number: EC-53A02337VC083462W". There are no system or error messages, nothing to help me figure out where the disconnect is. I've reset the site and IIS, so the credentials should be current.

Any ideas where in the code I could add some logging so I can figure out what isn't being sent or returned?

Edit:

Never mind, had a stored proc out of sync on production. When payment insert was called, the sql exception was being swallowed by the system making it really difficult to see what was going on.