I cant download or update any apps on my android device?

I am using a samsung galaxy centura over wifi like an ipod touch. I recently had to do a factory reset on it and now i cant update or download any apps. I am getting an error saying "App could not be downloaded/updated due to an error. (Error retreiving information from server. [RPC:S-5:AEC-0] I am running... show more I am using a samsung galaxy centura over wifi like an ipod touch. I recently had to do a factory reset on it and now i cant update or download any apps. I am getting an error saying "App could not be downloaded/updated due to an error. (Error retreiving information from server. [RPC:S-5:AEC-0]
I am running android ice cream sandwhich.
Update: I have turned it on and off. I have also cleared the cache of the marketplace app.
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