Hi Denise,
In "client machine" I don't installed ArcGIS Mobile, I installed in my machine to development this application.
The version installed in my computer is Mobile 10.1 (package arcGIS 10.1), that installed is Mobile 3.0. I don't understand this version controller, but it's.
PS: The "client machine" have installed .NET Framework 3.5 SP1.
thanks.