Disregard ... wrong build of Beans.............

Sorry if this is a silly or something boneheaded on my part.  I downloaded the most recent JBullet jar. The Netbeans project fails to build and gives the following (thanks for any help, in advance) :
i


nit:
deps-clean:
Updating property file: E:\NetBeansProjects\jbullet-20101010\build\built-clean.properties
Deleting directory E:\NetBeansProjects\jbullet-20101010\build
clean:
init:
deps-jar:
Created dir: E:\NetBeansProjects\jbullet-20101010\build
Updating property file: E:\NetBeansProjects\jbullet-20101010\build\built-jar.properties
Created dir: E:\NetBeansProjects\jbullet-20101010\build\classes
Created dir: E:\NetBeansProjects\jbullet-20101010\build\empty
Compiling 255 source files to E:\NetBeansProjects\jbullet-20101010\build\classes
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Creating empty E:\NetBeansProjects\jbullet-20101010\build\classes\com\bulletphysics\collision\narrowphase\package-info.class
Creating empty E:\NetBeansProjects\jbullet-20101010\build\classes\com\bulletphysics\util\package-info.class
Creating empty E:\NetBeansProjects\jbullet-20101010\build\classes\com\bulletphysics\collision\shapes\package-info.class
Creating empty E:\NetBeansProjects\jbullet-20101010\build\classes\com\bulletphysics\dynamics\constraintsolver\package-info.class
Creating empty E:\NetBeansProjects\jbullet-20101010\build\classes\com\bulletphysics\linearmath\convexhull\package-info.class
Creating empty E:\NetBeansProjects\jbullet-20101010\build\classes\com\bulletphysics\extras\gimpact\package-info.class
Creating empty E:\NetBeansProjects\jbullet-20101010\build\classes\com\bulletphysics\collision\dispatch\package-info.class
Creating empty E:\NetBeansProjects\jbullet-20101010\build\classes\com\bulletphysics\package-info.class
Creating empty E:\NetBeansProjects\jbullet-20101010\build\classes\com\bulletphysics\linearmath\package-info.class
Creating empty E:\NetBeansProjects\jbullet-20101010\build\classes\com\bulletphysics\dynamics\package-info.class
Creating empty E:\NetBeansProjects\jbullet-20101010\build\classes\com\bulletphysics\collision\broadphase\package-info.class
Copying 3 files to E:\NetBeansProjects\jbullet-20101010\build\classes
instrument-classes:
E:\NetBeansProjects\jbullet-20101010\build.xml:77:
java.lang.IllegalStateException: org.objectweb.asm.tree.analysis.AnalyzerException: Error at instruction 69: java.lang.ClassNotFoundException: com.bulletphysics.dynamics.DiscreteDynamicsWorld$ClosestNotMeConvexResultCallback
        at cz.advel.stack.instrument.InstrumentMethod.visitEnd(InstrumentMethod.java:224)
        at org.objectweb.asm.ClassReader.accept(Unknown Source)
        at org.objectweb.asm.ClassReader.accept(Unknown Source)
        at cz.advel.stack.instrument.Instrumenter.process(Instrumenter.java:119)
        at cz.advel.stack.instrument.InstrumentationTask.execute(InstrumentationTask.java:123)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
        at sun.reflect.GeneratedMethodAccessor50.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:390)
        at org.apache.tools.ant.Target.performTasks(Target.java:411)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1397)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1366)
        at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1249)
        at org.apache.tools.ant.module.bridge.impl.BridgeImpl.run(BridgeImpl.java:281)
        at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:539)
        at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:154)
Caused by: org.objectweb.asm.tree.analysis.AnalyzerException: Error at instruction 69: java.lang.ClassNotFoundException: com.bulletphysics.dynamics.DiscreteDynamicsWorld$ClosestNotMeConvexResultCallback
        at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown Source)
        at cz.advel.stack.instrument.InstrumentMethod.visitEnd(InstrumentMethod.java:99)
        ... 19 more
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: com.bulletphysics.dynamics.DiscreteDynamicsWorld$ClosestNotMeConvexResultCallback
        at org.objectweb.asm.tree.analysis.SimpleVerifier.getClass(Unknown Source)
        at org.objectweb.asm.tree.analysis.SimpleVerifier.isAssignableFrom(Unknown Source)
        at org.objectweb.asm.tree.analysis.SimpleVerifier.isSubTypeOf(Unknown Source)
        at org.objectweb.asm.tree.analysis.BasicVerifier.naryOperation(Unknown Source)
        at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
        ... 21 more
BUILD FAILED (total time: 18 seconds)