I'm absolutely new, wanting to experiment with the Sample App. I've entered my App ID, Dev ID and Cert ID into the "boxes" that ask for them. I've double checked that I entered them correctly. When I run the sample app, I get no result and when I look at the error code, it tells me that my AppID is invalid. I can see that it has the correct ID in the error. Any ideas why this might be happening? Thanks!