PUBLIC variables won't work when i call in the form. why is it that all the public variable that i declared in the main program will be missing in the form. here's my code.

***Main.Prg
PUBLIC oMyObject
SET CLASSLIB TO myClass
oMyObject = CreateObject("App")
oMyObject.Init()
DO FORM MyForm


***MyForm.Scx

*Init Method at myform.scx
WAIT WINDOW oMyObject.MyText


The oMyObject is missing when i run the program. is there anything wrong with my code or is there any setup in the VFP6 to activate the Public variable. please help me...