Connect to target plattform (fail)

When I want to connect to the target platform Visual Studio reports Connection failed.0x8973151A. What is the problem?

This means that the CoreCon files executed on the target device have not the same revision as the ones running on the host PC. This can happen when the kernel image contains the files from a Visual Studio 2005 installation while the files on the host PC comes from a Visual Studio 2008 installation or vice versa. Such constallation can occur when Visual Studio 2008 was installed after Visual Studio 2005 because the CoreCon files uses in both revision the same shared folder. You can get hints to solve this issue when you read the HowTo debug C++ or C# applications with Visual Studio 2008.