Targetting Android 1.6 platform from Android 2.1

I have android 2.1 SDK and I am trying to use AndEngine android gaming engine which requires android 1.6. Despite having higher SDK, I can't get AndEngine get to work with bunch of errors I am getting saying particular game example activity has not extended org.android.Activity class. How can I target Android 1.6 from Android 2.1? I can't even download android 1开发者_StackOverflow中文版.6 SDK now.

I did update and downloaded android 1.6 SDK and was able to clean the project and everything worked fine.