UPS methods are showing up fine, but I can't get USPS to show up. I have entered my existing USPS id and password that's working for live rate lookup on my old classic asp site; and when that didn't work, I created a new USPS id and password. I just get the error "This shipping method is currently unavailable ..." I've seen a few other people with this question, but no response from anyone.
I did find something online that indicated that we needed to have PHP Soap extension enabled, and I confirmed that that is enabled on my server. But still no luck.