Postage issue

[sheriff2971]

I keep getting the message 

You must select at least one domestic
postage service, other than Collection in
person, for flat or calculated postage.

I've selected one and cannot get past this message. I've uninstalled and reinstalled the app. 

Any ideas as I'm unable to sell on eBay!

[**peaseblossom**]

During the listing process try clicking on "See postage options" on the righthand side of the "Delivery Details" section, and enable what you want.