Automatic item/stats transfers when changing usernames aren't a thing on AlphaPlace, and thus, they have to be manually transferred.
You'll need to use a cracked launcher (such as BetaCraft v1) to log into your old username.

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# Log into your old and new usernames. # Use /pay from your old username. # Give contents of inventory to your new username. # Unlock your Lockette-locked containers and use your new username to lock them. # From your old username, use /home and teleport your old username to each of your set homes. # Run /sethome on your new account for each and every home you have. # If you own a faction, run /f invite on your old one and do /f join on your new one and then run /f admin . # Ask an admin if you have a rank that needs to be transferred.