Show indicator from subvi

Hello
I am very new in programming with labview. I have a problem showing property of a boolean indicator of a Subvi in a mainvi. The Subvi contains a while loop where the property of the indicater is set.
I have attached the two files in Labview-version 8.0.
The problem is that the property of the indicator of the main vi only changes at the seconed time. The reason for the problem is clear. The property of the indicator is set only once in the beginning and not continuous. Can somebody complete the attached vi´s with the necessary functions so that I can comprehend it. May be I can solve the problem with a global variable or a reference. I tryed a lot but my skills in programming are not so gut.
Thank you for your help
Attachments:
Mainvi Indicator.vi ‏11 KB
Subvi Indicator.vi ‏17 KB

Thank you all for your replies
@davidpcl : The VI´s you gave to me could help me a lot. But by using these vi´s one other problem was generated.
I want to open thes SubVi several times by the MainVi. The problem ist the correct parameterization of especially the stop-button. With the parameterization you gave me I could not use it several times in the MainVi.
Can somebody give me a help?
I attached the two new fiels.
Attachments:
MainVI addon.vi ‏17 KB
SubVI addon.vi ‏23 KB

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