Managing devices on iTunes Store I have bought an iPad 2 a few days ago, have configured it but I am unable to use FaceTime or iMessages. After searching a while, I found this page (http://support.apple.com/kb/HT4627). It says how I can manage my devices on iTunes Store but when I follow the steps and visit my account I don't see the MANAGE DEVICES item I should. Apparently the problem I am having is that my iPad is not associated with my Apple ID. The iPad is a brand new, bought on a store. 

How do I associate this new iPad with my apple ID?

Another problem is this: if I try to flick the switches for automatic downloads of apps and books the same switches flick to off half second later.
Make sure you've correctly set your Apple ID in the Settings section, for both Facetime and Messages applications, in your iPad.