hi, glad i could help.
The reason, why your version was giving you an error is the following:

Only PassThrough, SendLabel, Key, If,Else, Endif can be used inside of an <MovementKey> (stated on the MovementKey-Reference).

Thats why using <SendFocusWin> giving you an error.
Luckily Freddie was so kind to allow us to define a label for the FocusWin like:
<Label focus Local SendFocusWin>

so we can use the <SendLabel>-command in the <MovementKey>