I just installed Google Checkout module 1-4-7 on Zencart 1.3.8a.
After clicking on Confirm Your Order, it goes back to shopping cart contents. I tried the Google Checkout tester and it returned this
XML test sent
Code:
Authorization: Basic XXXXXX:XXXXXX
Content-Type: application/xml;charset=UTF-8
Accept: application/xml;charset=UTF-8
X-Origin-IP: 69.229.199.43
Test XML received
Code:
HTTP/1.1 400 Bad Request
Date: Wed, 17 Feb 2010 04:21:57 GMT
Server: Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635
X-Powered-By: PHP/5.2.12
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Set-Cookie: zenid=ff3aa409d6123722899ec2901b95b258; path=/; domain=www.revelation7.co.cc
Set-Cookie: zenid=ff3aa409d6123722899ec2901b95b258; path=/
Connection: close
Transfer-Encoding: chunked
Content-Type: text/html; charset=iso-8859-1

Invalid or not supported Message
My sandbox merchant ID and Key are correct. I used http for the API URL instead of https. I have all of the Google Checkout files in the right place. Curl is enabled. Why does the checkout go back to cart contents?