iPhone fix: When iTunes cannot backup the iPhone

Here's what to do if you try syncing or backing up the iPhone, but get the following error after afew minutes:

itunes could not backup the iphone because the iphone disconnected

http://discussions.apple.com/thread.jspa?messageID=6791982

I think the better solution is deleting the itunes preferences. My original solution only works for short time before iTunes starts complaining again. But I thought I would make this clearer. To delete iPhone Backup:

1) On the Mac, open iTunes and choose preferences from the iTunes Menu.
2) Then click on the iPhone icon
3) Use that screen to delete the iphone backup(s) listed.

To delete the reset the iSync preferences
1) Find the iSync application in the applications folder and launch it.
2) Choose preferences from the iSync menu.
3) Then click the button that says "Reset Sync History..."

Then go to iTunes and verify the data syncing is set up how you want it and hit the "Sync: button. Actually, if you make changes, you will see an "Apply" button instead. Click on that.

Now after all of this, you will really want to make sure you do have a backup of your iPhone on the computer. To make sure this happens, you can disconnect your phone, and quit iTunes. Now plug the iPhone back in and open iTunes. The iTunes application will backup your phone again when it does the syncing process.

Hopefully this fix is more permanent than my original post.