[rules-users] Problem with DSL in Drools 4.0.3

[tansey]

I've tried this in clean installs of different versions of eclipse and it's
still not recognizing it, so I must be missing a step.  The following is
what I did:

1. File -> New -> Drools -> Rule Project -> Finish
2. Added new Domail Specific Language named mylang.dsl to the source folder
src/main/rules
3. Removed all of the template rules except the Log one
4. Added "expander mylang.dsl" after import statement in Sample.drl
5. Uncommented line 45 (Reader dsl = ...) in DroolsTest.java
6. Commented out line 54: builder.addPackageFromDrl( source );
7. Uncommented line 57: builder.addPackageFromDrl( source, dsl );
8. Right-clicked on DroolsTest.java -> Run As -> Java Application

The program throws an exception saying it is unable to expand several lines.
Did I do something wrong? If not, do these steps work for anyone else?
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