Itunes Hangs as soon as iPad or iPhone connected

Question

I am running OS X 10.9.3 on a MacBook Air with Itunes 11.2.2 (3). iTunes runs quite happily until i plug my iPad in. The iPad is identified and then iTunes hangs. I have disabled automatic synching but I am at a loss as to what to try next. I powered off my iPad and retarted iTunes, in then promptly connected to my iPhone via WiFi and hung. The hangs are during the initail connection and the synch/back-up never starts.

Answer 1

Back up all data.
Triple-click anywhere in the line below on this page to select it:
~/Library/Application Support/SyncServices
Right-click or control-click the line and select
Services ▹ Reveal in Finder (or just Reveal)
from the contextual menu.* A folder should open with an item selected. Quit the application if it's running. Move the selected item to the Trash. Relaunch the application and test.
*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination  command-C. In the Finder, select
Go ▹ Go to Folder...
from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return.