I´m testing my in-app billing and followed the following steps:

Uploaded APK to the Market, created In-App items and published them (did not publish the app itself), exported a signed APK and installed that on a different device then my own (so there is a different primary account), but when I click on the button to purchase an item, it shows the itemname in a different view, but after a loading widget it gives the error:

How to resolve “The item you were attempting to purchase could not be found

I couldn´t find the solution on stackoverflow, can anyone give me more ideas?

Thanks