[rules-users] Problems During addPackageFromDrl

Hi, I am using the 29/aug snapshot of drools (4.0.1). During the PackageBuilder.addPackgeFromDrl(Reader) I am getting the following exception: Caused by: java.lang.NoSuchMethodError: org.antlr.runtime.DFA.unpackEncodedString(Ljava/lang/String;)[S at org.drools.lang.DRLParser.<clinit>(DRLParser.java:7302) at org.drools.compiler.DrlParser.getParser(DrlParser.java:204) at org.drools.compiler.DrlParser.parse(DrlParser.java:60) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:156 ) at br.com.auster.rules.AbstractRulesEngineProcessor.addPackages(AbstractRulesEn gineProcessor.java:349) at br.com.auster.rules.AbstractRulesEngineProcessor.init(AbstractRulesEnginePro cessor.java:254) at br.com.auster.rules.InvoiceRulesEngineFilter.configureEngine(InvoiceRulesEng ineFilter.java:201) at br.com.auster.rules.InvoiceRulesEngineFilter.configure(InvoiceRulesEngineFil ter.java:136) ..... ... 4 more Any ideas of what could be happening? <http://www.auster.com.br/> Solution <http://www.auster.com.br/> is our Business Marcos Tengelmann Relações Comerciais Auster Solutions do Brasil Avenida Ibirapuera 2120, cj 224 marcos.tengelmann(a)auster.com.br tel: fax: mobile: Skype ID: 5052-8535 <http://www.plaxo.com/click_to_call?src=jj_signature&To=5052-8535&... os.tengelmann(a)auster.com.br&gt; 5052-6711 9139.7983 <http://www.plaxo.com/click_to_call?src=jj_signature&To=9139.7983&... os.tengelmann(a)auster.com.br&gt; mtengelmann Want to always have my latest info? <https://www.plaxo.com/add_me?u=21475157331&v0=620798&k0=16779217&... k1=1001594622&src=client_sig_212_1_banner_join&invite=1> Want a signature like <http://www.plaxo.com/signature?src=client_sig_212_1_banner_sig> this?