can i know my iphone is detected in itunes,but i cant find it in my computer,can i know why?please.

I just tried to set up my email account.And tried using another email address to sent to my hotmail in iphone.But until now i did not received any mail through my iphone.how come digi takes so long?

Just would like to ask,how come everytime when i log in facebook, then when i press the middle button, after that when i need to go into facebook again, everytime i need to type my email add and password. Is there any method or settings to be done as very troublesome i need to type my email and password when i click on it? And in my settings,there is no facebook settings over there. Please advice. When i tried to download in my iphone,while in the installing process,they said please connect your itunes in the computer and log in. Just now in the morning,the facebook update in my itunes downloaded automatically, then when i tried to sync the new facebook application into my phone, it say failed due to some error. What is the problem actually? while sync, my phone must comes with internet? because i just change to a sim card without data plan.