Hello

We did not change any settings, but one of our zen cart websites does not show USPS shipping rates since around July 3rd. USPS module version was 2014-03-07. After we noticed USPS rates were not shown, I upgraded USPS module version to 2015-05-31, but the rates are still not shown. I changed template to classic zen cart template temporarily, but rates are still not shown. UPS rates are shown fine and other website which has same zen cart v1.5.1 and USPS 2014-03-07 shows USPS rates fine.

Could you help me please?
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What version of Zen Cart? v1.5.1
Is it a new install or an upgrade? No
What the addons/contributions you have installed? USPS and UPS
What type of server are you using? Hostgator
What version of PHP is installed on the server? 5.2.17 (Zend: 2.2.0)
What version of MYSQL is installed on the server? MySQL 5.5.42-37.1
What you were doing when your problem occurred? Nothing, nothing was changed
Have you attempted to fix the problem? Yes
What steps have you taken? removed USPS 2014-03-07 and installed USPS 2015-05-31