I'm using Zen Cart 1.3.7 just upgraded from 1.3.6. I also upgraded to 1.0.4r Google Checkout. My problem is it's not going through at all, I'm using the sandbox. Here's what happens when I test:

Add item to cart, checkout, choose shipping method (only have table as an option), choose payment method (it says google checkout only, but no gc logo, just plain text), continue checkout, confirm order, then a thank you message. It never goes to google checkout to enter any CC info or gc login. Nothing shows up in my GC seller's page/e-mail. I check my ZC orders and they are all pending.

Anyone know what I'm missing? Did something go wrong from either upgrading to ZC 1.3.7 or GC 1.0.4r?