custom packages

Hi everyone
I'm studying java at university and even if i don't like much this language i want to understand how it works so i started making few tries...
the prolem came qhen i decided to create a little package of my own.7i wrote my 2 classes (scan and print) and i copied them into my classpath in subfolders like this: $CLASSPATH/shd/io/*.class

well I thought it would be enough but it seems it is not...

initially everything worked but lately i realized that was because in the same path of the classes that used that package ther were a copy of my scan.class and print.class. when i removed them from my java folder (so the compiler now doesn't find them in the ./ path) every time i compile i have this error:
http://img529.imageshack.us/img529/3696/catturadn.jpg

javac recognises the class but says it's somehow not valid...

can anyone tell me what to do to fix it?

What package is scn declared as being in in its code?