this is not a very helpful error.
from the bindings panel, expand the USPS binding group and select the fukk request and full response bindings.
The full response will give us more details on what the shipping rate lookup is failing.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.