Java (android) - Class Not Found Exception

I'm trying to do some simple FTP stuff in Android. After researching a little bit, I decided to go with the apache-commons-net. Here are the steps I took to get it working under

Solution 1:

You need to copy the jar(s) to the libs directory in the project. The ADK picks the libraries from that folder and convert them into classes optimized for Dalvik.

Edit

There might be some more information in this question: Importing external .jar file to Android project