[android-developers] Android updated zip not working

I need to push some .so files in android system directory such as system/lib and system/bin so I wrote updated-script in android and also I signed my zip, I did the following manner

    <working directory>

          ----<system>

              ----<lib>

                ----<my.so>

I am using updated zip generator tool which create my updated script in META-INF\com\google\android folder(and also I put updated binary here)

updated-script

   

 

    show_progress 0.1 0

     

    copy_dir PACKAGE:system SYSTEM:

     

    show_progress 0.1 10

Copy the update.zip file to sdcard and apply it from recovery console,but it display some error

    installation aborted 

    E:Error in /tmp/sidlod/package.zip

    status 0

as of my knowledge I did every thing is right I follow the procedure from [ here][1]

  [1]: http://www.londatiga.net/it/how-to-create-android-update-zip-package/

But why I get his error, apart from that any procedure is needed for coping file into android  system folder via updated zip?

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