title: FBconnect is not working in android :(
body: <p>I have follow the step mentioned in <a href="http://code.google.com/p/fbconnect-android/wiki/Setup" rel="nofollow noreferrer">http://code.google.com/p/fbconnect-android/wiki/Setup</a></p>
  
  <p>But it is giving error on project build </p>
  
  <pre><code>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
  </code></pre>