Set FOCUS=Toggle after copy?

Hello everyone
I have Created this button for Copy Selected files to the Destination Then Focus should be Toggle, but some time it's works fine but some time the Focus doesn't changed after paste the file. Is my Code OK?

Copy
Set FOCUS=Toggle

How long does the copy take?

1 or 2 Seconds or sometime takes 5 Seconds Depending on How many Picture I have selected for Copy.

I'm guessing it doesn't work when you click on another window while the copy is happening. Try this:

Copy
Set SOURCE=Toggle
Set FOCUS=Source

Thanks Leo, It's Works for the first time, I will inform you if sometime it's doesn't work.