Can't get sub vi to process button pushed in main vi.

I'm trying to control whether or not data will be written to a spreadsheet through the use of buttons on my main panel. I have 5 sets of data and want to be able to tell the program when to save them by pressing a button. To do this, I created 5 sub vi's with the data as the inputs and a boolean control input representing the button. I then created a case structure inside a while loop, displaying nothing when the boolean is true (so the while loop just loops over and over again doing nothing when true) and saving it to a file when it is false, i.e. when button is released. for some reason, even though i wired the button to the appropriate terminal on the sub vi, when i release the button in the main vi, nothing
happens. the loop in the sub vi seems to always read the boolean as true, not comprehending my action in the main vi. However, if I release the button directly on the panel of the sub vi, it comprehends immediately and displays a dialog box for saving. any suggestions?
thanks a ton
yusif

Hello Kim,
I'm attaching my main vi along with 2 of the sub vi's i want to use within it. As you can see in the main diagram, there are 5 while loops that I want to place in sub vi's, but can't because of the problem I described earlier. I tried the global variable approach with no luck, perhaps I'm not implementing it properly though.
i look forward to your response
thanks again...
-yusif
Attachments:
Plot_Intermediate_Vars.vi ‏444 KB
Write_All_SUBVI.vi ‏91 KB
Write_Z_SUBVI.vi ‏44 KB

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Can't get sub vi to process button pushed in main vi.

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