path problem with j2me emulator tool

[tom arnll]

i am trying to run a midlet that uses an optional package ('location' for
GPS interface). When I compile the system sees the package and e'thing is
fine. But when I try to run the midlet, I get 'NoClassDefFoundError'. I
have tried adding the path to the emulator script but with no effect. And
when I add the following code to see the run time paths being used, the
system displays 'null':
 
import java.util.Properties;
System.out.println( System.getProperty( "java.class.path" ) );

Thanks,

Tom Arnall
north spit, ca