Was unable to load data class info from sync services.  try again later.

Since installing the latest version of itunes (11.1.5.5) whenever I have either mine or my wife's iphones (4 and 5c, both with the latest 7.1.1) turned on and I start iTunes, I receive the error message saying that itunes was unable to load data class info from sync services.  try again later.
If I leave the phones turned off and open iTunes, I am able to sync my old ipod so it appears to be an issue with the software on the phones? 
I'm just not sure where to start.  I've made sure that itunes has the latest version and no more updates are available.
Thanks in advance,
jamey8420

this is on a windows 7 machine, btw.

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