Question: Why does it still say "Status: ...stopping" after the Stop Sampling button was clicked?
If the situation persists, check to see if the rental period has expired in which case the entire sampling process is disabled.
In this case, "Status: ...stopping" will change to "Stopped" when an Rental Renewal, Basic or Extended activation key is applied.
If that isn't the reason, and the situation persists, please report the problem.
How do I renew the Rental Edition of Foxhound 5?
How do I report unexpected errors and exceptions?