Inability to run VIs in more than one sub panel

Hello,
I have a VI that contains a tab control with 8 tabs. Under each tab, I have placed a sub panel. I need to a separate VI in each sub panel simultaneously.
Using Open VI reference function and without any options,I have Invoked Nodes to Run VI and then insert respective VIs in unique sub panels.
Apart from a single VI running under a single tab, I am unable to see any of the other VIs running in all other tabs. Error Indicator shows No Error.
Could someone please tell me how to run multiple VIs, each in a unique sub panel, but under the same tab control?
I failed to execute a separate VI under a sub-panel that was even placed OUTSIDE the tab control...
Thanks in advance.

Hello Freelance_LV,
Thanks for your response.
Please find the snapshots of the Front Panel and corresponding Block Diagram of the sample code I intended to use (in Labview 12).
As you said, I too, was able to switch (insert-remove-re-insert) VIs to execute from a single sub-panel when required.
However, in this instance, I need to run 8 different VIs in 8 sub-panels simultaneously. Its so that my customer can look at different VIs for different tab selections at any point of time, and at the same time. Sadly, only 1 sub-panel VI seems to be running while the others arent, even though the logic for opening-running-inserting VIs for all sub-panels are the same...
Attachments:
SubPanelTestVI - FP.jpg ‏117 KB
SubPanelTestVI - BD.jpg ‏186 KB

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