facebook sdk problem

Hi guys i got problem with building my android game..

 Installation failed with the following output:
     pkg: /data/local/tmp/Package.apk
 
 Failure [INSTALL_FAILED_CONFLICTING_PROVIDER]
 
 4043 KB/s (24741273 bytes in 5.976s)
 
 UnityEditor.HostView:OnGUI()

and

 UnityException: Unable to install APK!
 Installation failed. See the Console for details.
 UnityEditor.Android.PostProcessAndroidPlayer.ShowErrDlgAndThrow (System.String title, System.String message, System.Exception ex)
 UnityEditor.Android.PostProcessAndroidPlayer.ShowErrDlgAndThrow (System.String title, System.String message)
 UnityEditor.Android.PostProcessAndroidPlayer.UploadAndStartPlayer (System.String manifestName, System.String stagingArea, UnityEditor.Android.AndroidDevice device, System.String packageName, Boolean developmentPlayer, Boolean retryUpload)
 UnityEditor.Android.PostProcessAndroidPlayer.PostProcessInternal (System.String stagingAreaData, System.String stagingArea, System.String playerPackage, System.String installPath, System.String companyName, System.String productName, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry)
 UnityEditor.Android.PostProcessAndroidPlayer.PostProcess (BuildTarget target, System.String stagingAreaData, System.String stagingArea, System.String playerPackage, System.String installPath, System.String companyName, System.String productName, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry)
 UnityEditor.Android.AndroidBuildPostprocessor.PostProcess (BuildPostProcessArgs args)
 UnityEditor.PostprocessBuildPlayer.Postprocess (BuildTarget target, System.String installPath, System.String companyName, System.String productName, Int32 width, Int32 height, System.String downloadWebplayerUrl, System.String manualDownloadWebplayerUrl, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:316)
 UnityEditor.HostView:OnGUI()
 
 

when i try to delete android manifest file located at plugins/android it builds and give this error

 An android manifest must be generated for the Facebook SDK to work.  Go to Facebook->Edit Settings and press "Regenerate Android Manifest"
 UnityEditor.HostView:OnGUI()

what i did ? removed facebook sdk and re imported it created another keystore my phone storage is not full i added the path of openssl and java

it was working i didnt do anything last time and got these errors... please help me