Google play services (lib build path error)

I have 2 computers on which I develop my app. On one of the I had a problem with adding Google play services library.
Each time I have imported the Google play services into workspace (eclipse) and then built a path to it, nothing happened and then the path was receiving error (an X symbol next to the lib include).

The solution was to set both project (Google service and My project) on the same physical driver (for example C driver).