Zebra's firmware has changed to now require a 32 bit instead of an 8 bit  password to lock Gen2 tags. This change rendered Easylabel's Zebra driver unable to lock Gen2 tags.  If you are experiencing problems locking Gen2 tag, you should first confirm that you have the current version of Zebra firmware in your printer and are using an Easylabel software  version newer than 5.9.0.1377.