Installed and configured USPS module, got it set to USA but when I place a test order, I get the following:
"Unfortunately there are no suitable shipping methods available for your order. This may be because the total weight of your order is too high or we cannot ship to your country. Please contact a member of our staff for any further inquiries."
I've attached screengrabs for my configuration. My storefront is http://qm.sfi.org/index.php