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The e-commerce.

Unable to get USPS Module to work in 2.2 MS2


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I am getting the following error message when I try to checkout with the USPS module:

This is currently the only shipping method available to use on this order. 

  United States Postal Service 

An error occured with the USPS shipping calculations.

If you prefer to use USPS as your shipping method, please contact the store owner.


I have corrected the usps.php so now it reads:

       case 'production': $usps_server = 'Production.ShippingAPIs.com';
                          $api_dll = 'ShippingAPI.dll';
       case 'test':
       default:           $usps_server = 'testing.shippingapis.com';
                          $api_dll = 'ShippingAPITest.dll';


I have to accounts with USPS, one is registered, and was put on the production server, and on my old site (MS1) it works fine. I have the following entered into the admin screen for USPS on the new MS2 site:


Enable USPS Shipping



Enter the USPS User ID

XXXXXXXXXXX - Replaced with Xs for security


Enter the USPS Password

XXXXXXXXXXX - Replaced with Xs for security


Which server to use



Handling Fee



Tax Class

Taxable Goods


Shipping Zone



Sort Order




I had planned on bring my store live this weekend, so any help would be appreciated.

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