Google Map does not load on emulator with Jelly Bean 4.3

Google Map does not load on emulator with Jelly Bean 4.3

pI am building an app that uses android Google api v2. But whenever I try
to launch, it crashes. I have all the libraries added to my project.
However, after adding Google play services library, it shows a cross sign
when I reopen the project's properties (under Library section). I don't
think this is causing my app to crash but I couldn't find the reason
behind this error. I re-downloaded Google play services as well. Please
help me fix this crashing!/p pLogCat shows:/p pCaused
by:android.support.v4.app.Fragment$InstantiationException: Unable to
instantiate fragment com.google.android.gms.maps.MapFragment:Make sure
class name exists, is public and has an empty constructorthat is public/p
p....../p pCaused by:java.lang.ClassNotFoundException: Didn't find class
com.google.android.gms.maps.MapFragment/p