Error Exporting the Android App on Emulator

I have already installed the android SDK; and I have the Unity free with the Android license on it. The procedure of configuration of the emulator i have done according this videos: http://www.youtube.com/watch?v=DfSL4KK4nzk&feature=fvst -> android emulator install http://stackoverflow.com/questions/7663996/sdk-manager-wont-start-windows-7-64-bit ->unity export(first video)

The problem I have is: When I click the "build and run", the app doesn't apear in the emulator screen, instead an error message pop's up(print below):

If any more data is necessary, I'd be happy to inform. What can I do to solve this problem? My Unity version is the Up-to-Dated one, 3.5.