error with shipping module on checkout

First I have a clean install on ver 1.5.1.

The problem I am having is I get the error "Please enter a valid ZIP Code for the sender. " when I (a customer) checkout. I get to the shipping module which I am only using USPS and I get the error. Now I am sure I just missed inputting something somewhere but I am having a hard time figuring out where that is. Any help would be appreciated.

Thank you

I understand that the error is coming from the USPS server. I have the address of the shop in System -> Settings. Is there somewhere else that I should have the zip code of the shop to work with the USPS shipping module.

Thanks for any help you can offer.

Looks like you have an error in the zip code field. Perhaps a space?

I registered just to say that I made the same mistake... I was tired so I assumed the second box was the password box!

Thanks for posting the solution to this! I had the same mistake! :-)