you HAVE to use your user name as... "blablabla@facebook.com" not with the mail @hotmail o any that you use to open in a pc...

If you want to know what's your facebook user go to your page (In a PC), nearby home, there is an arrow, click there and go to account settings, in the third row you have email, you have there your user name @facebook, then go to your acounts in your phones a put it like that... I hope you could understand me... bye!