I have follow the step mentioned in http://code.google.com/p/fbconnect-android/wiki/Setup
But it is giving error on project build
UNEXPECTED TOP-LEVEL EXCEPTION: java.lang.IllegalArgumentException: already added: Lcom/codecarpet/fbconnect/FBLoginDialog$FBRequestDelegateImpl; [2010-08-07 16:46:13 - fbconnect-sample] at com.android.dx.dex.file.ClassDefsSection.add(ClassDefsSection.java:123) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.dx.dex.file.DexFile.add(DexFile.java:143) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.dx.command.dexer.Main.processClass(Main.java:299) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.dx.command.dexer.Main.processFileBytes(Main.java:276) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.dx.command.dexer.Main.access$100(Main.java:56) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:228) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:245) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:130) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:108) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.dx.command.dexer.Main.processOne(Main.java:245) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.dx.command.dexer.Main.processAllFiles(Main.java:183) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.dx.command.dexer.Main.run(Main.java:139) [2010-08-07 16:46:13 - fbconnect-sample] at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source) [2010-08-07 16:46:13 - fbconnect-sample] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [2010-08-07 16:46:13 - fbconnect-sample] at java.lang.reflect.Method.invoke(Method.java:616) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.ide.eclipse.adt.internal.sdk.DexWrapper.run(Unknown Source) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.ide.eclipse.adt.internal.build.ApkBuilder.executeDx(Unknown Source) [2010-08-07 16:46:13 - fbconnect-sample] at com.android.ide.eclipse.adt.internal.build.ApkBuilder.build(Unknown Source) [2010-08-07 16:46:13 - fbconnect-sample] at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:627) [2010-08-07 16:46:13 - fbconnect-sample] at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) [2010-08-07 16:46:13 - fbconnect-sample] at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:170) [2010-08-07 16:46:13 - fbconnect-sample] at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:201) [2010-08-07 16:46:13 - fbconnect-sample] at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:253) [2010-08-07 16:46:13 - fbconnect-sample] at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) [2010-08-07 16:46:13 - fbconnect-sample] at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:256) [2010-08-07 16:46:13 - fbconnect-sample] at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:309) [2010-08-07 16:46:13 - fbconnect-sample] at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:341) [2010-08-07 16:46:13 - fbconnect-sample] at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:140) [2010-08-07 16:46:13 - fbconnect-sample] at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:238) [2010-08-07 16:46:13 - fbconnect-sample] at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2010-08-07 16:46:13 - fbconnect-sample] 40 errors; aborting [2010-08-07 16:46:13 - fbconnect-sample] Conversion to Dalvik format failed with error 1