Java Programming

I am new to Protocol Buffers. I was trying to get the Google tutorial to work to get an initial idea. Link below:

http://code.google.com/apis/protocolbuffers/docs/javatutorial.html

I compile the .proto file fine. But when I get to the section "writing a message" to use the generated buffer classes I get error: "com.example.tutorial.AddressBookProtos.AddressBook" cannot be found. They are in the same directory though.
Any help is appreciated.

Thanks,