Mail syncing issue-Error Message iPhone

I have recently changed the configuration on my phone to sync with Mobile Me. All is working except I get the following Error message regarding Mail. (paraphrased) iTunes cannot sync mail accounts because an error occurred in mapping record identifiers. Try syncing your iPhone again. If problems, replace the mail accounts on the iPhone from the info tab in the iPhone preferences.
I DONT KNOW WHERE TO FIND THE INFO TAB OR THE IPHONE PREFERENCES. NOTHING LIKE THAT IS SEEN IN SETTINGS ON THE PHONE ITSELF. WHERE SHOULD I BE LOOKING TO FIX THIS AS SUGGESTED?
iPhone 4 iOS 4 Also using MacBook Ai