Copy fields then skip over them later

I'm creating a form from an existing word document. I know about copying fields and having the data entered once and then that information is automatically populated on the copied fields throughout the rest of the form. However when I test the form, and tab through, Adobe still tabs me to the duplicated fields that already have data.

I have tried giving the duplicated field a different name - then adding the following script to the third option (Custom Calculation script) in the Calculation Tab of the duplicated field.

The original name of the field is "Name of Trust". My duplicated name of field is called:  "Name of Trust2"

event.value = getField("Name_of_Trust").valueAsString;

I'm not very good with scripting - (in fact a novice) but I've searched through this forum and found some instructions re: this issue. The problem is - this scripting is not working for me. Can anyone help please?

Thanks in advance