iTunes can't sync my iPhone 4 because the Apple Mobile Device Service is not started.

I tried syncing my iPhone 4 today and it brought up this message saying: This iPhone cannot be used because the Apple Mobile Device Service is

not started,,,,,,Have no clue what this means or what to do,,,,,Have had this phone since March and the last sync was on May 11,,,,,The nearest

Apple Store is about 70+ miles 1 way,,,,,can anyone help resolve this?