RE: [rules-users] Problem with DSL in Drools 4.0.3

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?