Unable to load class... .sprite

Hi, I am trying to run a simple MIDP 2.0 program on my Samsung N400. I just want it to play 5 *.png's in succession. The program works in the J2ME Toolkit emulator, but when I download it from my phone and run it, I get the error message "Unable to load class javax.microedition.lcdui.game.Sprite". I've tried to put the "Sprite.class" file into the *.Jar file, tried to make a class "sprite" (Sprite sprite), and tried making a public class Sprite. Does anyone have any other methods that I could try to get it functioning on my phone. Thanks!

[553 byte] By [mi6agent56a] at [2007-9-28 6:18:45]