Carbonio mobile app for IOS

hello.

Many questions from my users on Iphone app

1.Cannot send attachment.
when user open XLS sheet and use share button than select carbonio.
And than letter cannot be send,cannot be deleted.When user enters the application there is an erro about error in DRAFT mails.
This happens until logoff logon process.

2.The same proble when i attachet TXT file from iphone.It cannot be send.And error also appears.

3.Cannot create contact from app.It is created but then disapears.

Could anyone encountered with this problems?how to solve?