Android : I Can't find my avd in Android device chooser in eclipse for mac?

i create a avd and run it before my android programe running. In eclipse , it can found my avd in devices window. but when i am running my android demo, in android devices chooser, i can't found my avd. If i close avd and restart it when android devices chooser showing, the android devices chooser found it.

my system is maxos 10.10