Still stay when talking. How to make it?

Hi!
How to make player still stay (can't move) when talking
I using this talking box
http://game-editor.com/forum/viewtopic.php?f=5&t=6828&p=48833&hilit=textbox#p48833
How to make player still stay (can't move) when talking
I using this talking box
http://game-editor.com/forum/viewtopic.php?f=5&t=6828&p=48833&hilit=textbox#p48833