Sorry, again with the report form preview: (VFP 5.0 spanish version)

I am trying to make my report form preview work .
I was looking and searching in all the UT for a lot.
I found a lot of answers, and i tried it:

DEFINE WINDOW pepe FROM 1,1 TO 20,100 NAME mariano SYSTEM FLOAT CLOSE ZOOM MINIMIZE
mariano.SHOW()
--- It Works !!

mariano.CAPTION="hola"
--- Again it works....

REPORT FORM gamas1 PREVIEW WINDOW pepe NOWAIT
--- Wonderful .....


mariano.CAPTION="adios"
--- :-( @#*!!

well, I look at the window menu an there are two windows!!: 1:"hola" 2:"adios"

I need it in SDI forms, but first i tried it in normal forms.

What is wrong?
thank you