import statement causing errors

[Pedge]

it all worked fine until 3 days ago, it just suddenly stopped compiling classes that had the import statement at the top. i use the same class on another pc and at university and it works fine, but when i try it on my own pc is causes the following errors:
C:\My Documents\MYJAVA\Test.java:1: cannot resolve symbol
symbol : class KeyboardInput
location: package easyIO
import lcm2.easyIO.KeyboardInput;
^
C:\My Documents\MYJAVA\Test.java:11: cannot resolve symbol
symbol : class WebFile
location: class Test
WebFile wi[], wp[];
^
C:\My Documents\MYJAVA\Test.java:12: cannot resolve symbol
symbol : class WebImage
location: class Test
wi = new WebImage[3];
^
C:\My Documents\MYJAVA\Test.java:13: cannot resolve symbol
symbol : class WebPage
location: class Test
wp = new WebPage[3];
^
C:\My Documents\MYJAVA\Test.java:33: cannot resolve symbol
symbol : variable KeyboardInput
location: class Test
Name = KeyboardInput.getLine("File Name:");
^
C:\My Documents\MYJAVA\Test.java:34: cannot resolve symbol
symbol : variable KeyboardInput
location: class Test
Extn = KeyboardInput.getLine("Extn:");
^
C:\My Documents\MYJAVA\Test.java:35: cannot resolve symbol
symbol : variable KeyboardInput
location: class Test
Author = KeyboardInput.getLine("Author:");
^
C:\My Documents\MYJAVA\Test.java:36: cannot resolve symbol
symbol : variable KeyboardInput
location: class Test
DownloadSize = KeyboardInput.getInt("Size:");
^
C:\My Documents\MYJAVA\Test.java:37: cannot resolve symbol
symbol : variable KeyboardInput
location: class Test
Width = KeyboardInput.getInt("Width:");
^
C:\My Documents\MYJAVA\Test.java:38: cannot resolve symbol
symbol : variable KeyboardInput
location: class Test
Height = KeyboardInput.getInt("Height:");
^
10 errors

Tool completed with exit code 1

Please help
thanks
Pedge