error after install-plugin

[hkong]

I'm building a new grails app using Grails 2.0.1. I encountered the following error after installing the plugin (version 2.0.M2):

java.lang.NoClassDefFoundError: Lorg/apache/xml/resolver/tools/CatalogResolver;
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.codehaus.gant.GantBuilder.invokeMethod(GantBuilder.java:99)
at _GrailsCompile_groovy$_run_closure3_closure8_closure9.doCall(_GrailsCompile_groovy:62)
at _GrailsCompile_groovy$_run_closure3_closure8_closure9.doCall(_GrailsCompile_groovy)
at _GrailsCompile_groovy.withCompilationErrorHandling(_GrailsCompile_groovy:69)
at _GrailsCompile_groovy.this$4$withCompilationErrorHandling(_GrailsCompile_groovy)
at _GrailsCompile_groovy$_run_closure3_closure8.doCall(_GrailsCompile_groovy:61)
at _GrailsCompile_groovy$_run_closure3_closure8.doCall(_GrailsCompile_groovy)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
at _GrailsCompile_groovy$_run_closure3.doCall(_GrailsCompile_groovy:58)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
at org.codehaus.gant.GantMetaClass.processClosure(GantMetaClass.java:81)
at org.codehaus.gant.GantMetaClass.processArgument(GantMetaClass.java:95)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:128)
at _GrailsCompile_groovy$_run_closure2.doCall(_GrailsCompile_groovy:45)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
at _GrailsCreateArtifacts_groovy.createRootPackage(_GrailsCreateArtifacts_groovy:122)
at _GrailsCreateArtifacts_groovy.this$4$createRootPackage(_GrailsCreateArtifacts_groovy)
at _GrailsCreateArtifacts_groovy$_run_closure1.doCall(_GrailsCreateArtifacts_groovy:54)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
at CreateFunctionalTest$_run_closure2.doCall(CreateFunctionalTest:35)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
at org.codehaus.gant.GantMetaClass.processClosure(GantMetaClass.java:81)
at org.codehaus.gant.GantMetaClass.processArgument(GantMetaClass.java:95)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:128)
at CreateFunctionalTest$_run_closure1.doCall(CreateFunctionalTest:30)
at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
at gant.Gant.withBuildListeners(Gant.groovy:427)
at gant.Gant.this$2$withBuildListeners(Gant.groovy)
at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
at gant.Gant.dispatch(Gant.groovy:415)
at gant.Gant.this$2$dispatch(Gant.groovy)
at gant.Gant.invokeMethod(Gant.groovy)
at gant.Gant.executeTargets(Gant.groovy:591)
at gant.Gant.executeTargets(Gant.groovy:590)
Caused by: java.lang.ClassNotFoundException: org.apache.xml.resolver.tools.CatalogResolver
... 63 more
| Error Fatal error during compilation org.apache.tools.ant.BuildException: java.lang.NoClassDefFoundError: Lorg/apache/xml/resolver/tools/CatalogResolver;