Java help please

[Pokerking98]

C:\jdk1.6.0_11\bin>javac piracypermissionpolicy.java
piracypermissionpolicy.java:18: cannot access com.threerings.io.w
class file for com.threerings.io.w not found
public class PiracyPermissionPolicy extends CrowdPermissionPolicy
^


Any idea what im doing wrong?

[servlet]

com.threerings.io.w is not in classpath. you need to add it to classpath before you can compile