BackupServiceBinder restore only 1st saved version of a file

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http://stackoverflow.com – I got the sample for Restore/backup by android sdk samples, and its working fine, but updating only 1st version of data. So when i install to a device, modifying some data, after all the time when i uninstall/then re will be restored only that 1 version when i installed 1st the app whit that modification. I think data after the 1st update to the cloud will never more change. Here is my log for : 1- installing apk 2- changing the data state. 3- uninstalling the apk 4- reinstall 5- the 1st restored that will be restoring V/BackupManagerService(192): restoreAtInstall pkg=com.lynx.backup toke (HowTos)