Problem with DialogEX

this script on StartUp
............................

DialogEX.TimedCustomMessage("ÑÓÇáÉ ÊÑÍíÈ ÈÇáãÓÊÎÏã", "ãÑÍÈÜÜÇ ÈÜß ãÚ ÇÓØÜæÇäÉ ÇáÞÜÜÑÂä ÇáßÜÜÜÑíÜã",DEX_ALIGN_CENTER, "abood|abood",1,2,5000,500,150,DEX_SHOW_SCREEN,50,50,20000,50000,DEX_NORM,DEX_SLIDE_TOPLEFT,5000,DEX_SLIDE_TOPLEFT)
it is True Script And works well But in Preview My Object More than once.. The Message appears and remains constant why ????

I want this Message to appear only once

what can i do ?

:hypno: :hypno: :hypno: :SOS: :SOS: :SOS: [/b]