Can't import google_play_services-lib using eclipse

I re-installed google_play_services successfully and I have google_play_services-lib in my workspace. When I try to import it as a project in eclipse I use File-> Import->Existing Projects into Workspece -> Next -> Select root directory and then I find and select google_play_services-lib but finally it says "no project found to import". Why is that? How can I import this lib into eclipse?

I forgot to mention that I followed the steps at http-://developer.android.-com/google/play-services/setup.html

I solved the problem in a very unexpected way. I fancy I should try to import the archive (the zip file containing the google-play-services directory.) And it worked!!! lol!