iOS App Icon on Afaria

Hi,

We've just released an iOS app for a customer. They use Afaria as their Enterprise Store and we have a problem with our custom app icon.
Everytime they upload the .ipa on Afaria, they are not able to set up a custom app icon, and the icon that shows up in the store is not one of those we've configured via the Xcode Asset manager. We've tried several solutions following Apple guidelines (including an iTunesArtwork file for example), but we still have the same problem.

Any idea or suggestion to help us solve this issue?

Thanks for your help!