"username takasu is already taken" ? (iOS)

Hi,

Everyplay integration is done, able to record video, edit it, etc...
But during the share, if the user uses his own nickname it always pops the "username takasu is already taken" message.

Not sure how should the user login to everyplay into the application?
There is no login button in the share window....

Does compiling the app with a Dev provision could be an issue?

Any idea?... ...