Hello, I am running Zen Cart 1.3.7.1 with the UPS XML 1.3 module for shipping. I only want to ship from Texas to the US, Canada and Mexico. I have configured this module to use everything from my UPS account and Canada and US seem to be working just fine in the shipping estimator.

However, when trying to estimate a Mexico state and postal code, nothing happens when you click the update button. No errors, nothing.

Within the zones section of the Admin tool I placed in all the states and 2 letter codes just like I did for Canada but Mexico just isn't working.

Help please!