Setting up "Find My iPhone" using an existing iTunes account
I have an iPhone 4 with the latest iOS (4.2.x). I can sync it with iTunes on this computer.
I want to set up "Find My iPhone" on this device. I'm following the directions at this site:
http://www.apple.com/iphone/find-my-iphone-setup/
On Step 4, when I attempt to input my Apple ID, I get a notice that "username or password is incorrect". If I just type my Appl eID in (without making it an email address), I get an alert "Unsupported Apple ID" and that Mobile Me requires an Apple ID that is an email address.
My Apple ID is "spdorsey". It is not an email address.
How can I get this to work?
Thanks
12-core Mac Pro 2.93 GHz, 24GB RAM, ATI Radeon HD 5870, 12TB Storage, 30" Screen, Mac OS X (10.6.4), External Blu-Ray burner, Canon 5D MkII