[rules-users] Problem loading DRL from DSL?

Is there a bug with drools when you try to use a dsl and drl? I've read several post where people seem to be getting the same errors as I am. My drl looks like this: package com.insurance expander underwriting.dsl rule "Low Premium" when There is a policy - for a male - with a premium less than 50.00 then Accept the policy; end I have this code to read the drl and associated dsl and build a package: String drl = "/underwriting.drl"; String dsl = "/underwriting.dsl"; PackageBuilder builder = new PackageBuilder(); InputStreamReader drlInput = new InputStreamReader(InsuranceExample.class.getResourceAsStream(drl)); InputStreamReader dslInput = new InputStreamReader(InsuranceExample.class.getResourceAsStream(dsl)); builder.addPackageFromDrl(drlInput, dslInput); RuleBase ruleBase = RuleBaseFactory.newRuleBase(); ruleBase.addPackage( builder.getPackage() ); When I run the code I get a 'ExpanderException' Exception in thread "main" org.drools.rule.InvalidRulePackage: org.drools.lang.ExpanderException@157aa53 org.drools.lang.ExpanderException@6f50a8 org.drools.lang.ExpanderException@187814 org.drools.lang.ExpanderException@73a7ab org.drools.lang.ExpanderException@104faf8 org.drools.lang.ExpanderException@1f8c6df org.drools.lang.ExpanderException@1c86be5 org.drools.lang.ExpanderException@123b25c org.drools.lang.ExpanderException@92bbba org.drools.lang.ExpanderException@162dbb6 org.drools.lang.ExpanderException@146c1d4 org.drools.lang.ExpanderException@5f8172 org.drools.lang.ExpanderException@2ba11b org.drools.lang.ExpanderException@5e179a org.drools.lang.ExpanderException@15fadcf at org.drools.rule.Package.checkValidity(Package.java:408) at org.drools.common.AbstractRuleBase.addPackage (AbstractRuleBase.java:288) Can someone tell me what I'm doing wrong and what the correct code would be for reading a drl/dsl and building a package and rulebase? Does building drl rules from a dsl not work in drools 4.0.1? Thanks, Rod