I'm having some problems understanding what your problem is exactly, but the first thing to say is that using a global variable to transfer a refnum can be very problematic unless you time it just right. You may wish to consider using some other means (like VI server).
I'm not sure about the second part - Do you have the visible property? If so, you should also have the Blinking property. If you don't have any properties, start again - create a reference for the original boolean, right click the refenence and select Create>>Control. Copy the new control and paste it in the global variable. Wire the reference into the new global variable in the first VI and wire the global into the property node in the second.
Now you should have the properties.
You will have to run the first VI first, to pass the value of the reference into it, or it won't work.
As said earlier, this is a very unrecommended way for doing this.
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