[appigo-todo] I can't save my alert settings.

I followed the instruction to save my alert settings for my iPhone as
I did for my iPod. I firstly installed todo list and notebook for my
iPod Touch, then after purchasing four months ago my iPhone, I wanted
to install todo and notebook in my iPhone. I successfully install
Notebook. But, I have problems to set up my todo, especially the
alerts. I entered the same settings in my iPhone as for my iPod Touch
(email address, of course my name…), but when I try to save, it can't
connect with Appigo Todo. He tried and tried via the phone mode and
via the wifi. I can't. I tried to modify the setting of my iPod Touch
and it saved quickly but when I do with my iPhone, I can't.
Did someone have the same problem ?
Sorry for my English