Using Control Reference to change subVI control - sub VI also called using a container

Hello

I am in need to update a control inside a sub VI that is also called inside a container in the main VI.

Please see the project attached.

My goal is simple -

1. Change the "Main VI calling sub VI-Container.vi " panel's "FGV state"
2. once the state changes, it needs to be propagated to the sub VI that is called within the container
3. The sub VI's (sub VI called is "Check Time FGV.vi")  "FGV state" also needs to change when the main front panel's control

How do I accomplish this ? just a FYI - the sub VI being called is at "C:\Projects\User Examples\Check Time with FGV\Check Time FGV.vi"

Also my stop button functionality is broken, not sure why.

Thanks for your help.