having trouble seting up sons phone

Hello Jon Hawk,

Thank you for using Apple Support Communities.

For more information, take a look at:

iOS: Setting up Home Sharing on your iOS device

http://support.apple.com/kb/ht4557

Setting up Home sharing on your iOS device

1. Tap Settings > Music or Settings > Video to enable Home Sharing.
   Note: Enabling Home Sharing in either setting will enable Home Sharing for both types of content.
2. In the Home Sharing section, enter the same Apple ID and password you entered on your computer (or computers) and tap the return button.

iTunes Store: Associating a device or computer to your Apple ID

http://support.apple.com/kb/ht4627

When you turn on iTunes Match or Automatic Downloads, or when you download past purchases on an iOS device or computer, that device or computer becomes associated with your Apple ID.

Have a nice day,

Mario