Correct error in java program (javacv-opencv)

Hello I am developing a java program using javacv (java library for opencv). I have done a short demo, it compiles, but at runtime it is unable to find a library. I tried to install opencv with .jar extensions, but I have done something wrong. It is a demo that uses some source from a tutorial that draws the corners of a chessboard (useful for calibration, but for me is only to test where are the 4 corners of the chessboard) I can send you the image of the machine (it is a Ubuntu 14.04 64 in VirtualBox). You should apply the correction there and send me back (using your preferred cloud storage). The program should execute and draw 4 points in the image (there are a lot of demos of that code, google "opencv chessboard") Feel free to ask