[1.7.2]Show gui on user first join

[RedEnergy]

Hello, i need to show player gui on him first join. I tried to catch PlayerLoggedInEvent and if there is not flag, which show if player already have been playing on this server, show player gui using Minecraft.displayGuiScreen() method, but this method dose nothing, please help, all sources below.

Classes: Class which catches PlayerLoggedInEvent, Class which performing action (display gui) , Gui class

Please help!

[Eternaldoom]

You could use IExtendedEntityProperties to add a boolean to the player's NBT (defaulting to false). When the player logs in, if the boolean is false for that player, open the GUI and set it to true.

[RedEnergy]

It's not a problem, my method MethodManager.onFirstJoin() executing correct because i can see "MethodManager.onFirstJoin executed" message (I using it like debug message ), my problem is that it doesnt displays gui

[Ernio]

Your method calling GUI has been removed. Care to refresh? Also have you registered GUI?

[RedEnergy]

I am using forge 10.12.2.1121. Can you provide some examples gui registering?