Cannot create a new Android Project using Eclipse

I recently updated my sdk version from 18 to 20. I tried to create a new Android Application Project. I filled up all the needed fields to create a new project but when I came to the last page of the creating a new Android Application Project, this appears: " This templates depends on the Android support library, which is either not installed, or the template depends on a more recent version than the one you have installed. Required version: 8 Installed version: Not installed " Then it also displays this link. http://developer.android.com/sdk/compatibility-library.html It also has two buttons: - Install/Upgrade - Check again When I click the first button, it's not downloading, installing or upgrading any of my software. And this messages display to my Console: ``` [2012-07-15 21:55:08 - SDK Manager] Fetching https://dl-ssl.google.com/android/repository/addons_list-2.xml [2012-07-15 21:55:16 - SDK Manager] Fetched Add-ons List successfully [2012-07-15 21:55:16 - SDK Manager] Fetching URL: https://dl-ssl.google.com/android/repository/repository-7.xml [2012-07-15 21:55:37 - SDK Manager] Done loading packages. [2012-07-15 21:55:37 - Android Compatibility JAR not found:] D:\Software\Eclipse\v4\android-support-v4.jar ``` The button two does not do anything at all. I downloaded the compressed file 'android-sdk_r20-windows' and extracted it to my hard drive. I used it to download the following: - Android SDK Tools - Android SDK Platform-tools - SDK Platform API8 - Google APIs 8 I don't understand what my problem is, my eclipse works properly when I still haven't updated it yet. Did I forget do download some required tools or something? Please help me. Add: My eclipse works fine when I imported my previous Android Applications (my app runs on my emulator), the only problem is that I can't create a new Android Application.