Remove a table row with a button in Livecycle Designer ES3

I have a table in Livecycle that has 16 static rows. More rows can be added or removed dynamically at the end of the table.

I would like the user to be able to delete one of the static rows if they want however I can't get the script to work.

I have a button at the end of the row with the script:

driverTable._Row2.removeInstance(true);

I have tried various forms of this script such as not using the shorthand for "instanceManager", leaving "true" out, etc. Where it says "Row2" I would use this script for the subsequent rows, Row3, Row4 etc.

I have tried it with the initial count set to 1 and tried it set to zero. The table is in a flowable subform.

Can anyone help?