ArcGIS Mobile 10.2 Installation

[DeeptiPuri]

Hi Everyone- We are upgrading to 10.2 version of ArcGIS Mobile from 10.1. I installed 10.2 Desktop (Standard), 10.2 for Windows Mobile and Runtime SDK 10.2 for Windows Mobile. My machine has Visual Studio 2008 installed. It is Windows 7 so I have 3.5 framework with SP1. I have installed multiple Windows Mobile SDK and  including 6.5 Professional Developer Tool Kit. But when I open my old project _WM are not loading up in Visual Studio. It gives only a generic message - "the application fro project is not installed'. Am I missing something on ArcGIS side or in Studio.

Thanks

[DeeptiPuri]

while trying a new task- I got this error message. so I guess it is linking to registries.