Why won't my iphone 4s connect to itunes?

i just got a brand new iphone 4s, and this is the first time I've ever connected it to my computer. i plugged it into my computer (mac), and it started charging. my computer automatically brought up itunes and iphoto, and iphoto recognized it, but itunes did not. i clicked on my finder but it didn't list my iphone there either. please help!