Custom field has disapeared

For some reason the custom field with the banking details hassuddenly disapeared from my invoices. When I look back at previous invoices the field is still there but does not show in any new invoices I create.

Check under Settings to make sure the field is set to show on documents. If there was default content, look under Form Defaults.

Sorry Tut I have still not been able to rectify this situation and it is strange as it used to work fine.
I have attached what the invoice looks like with an image of the custom feild screen looks like. Can you please check to see if I have set up everything right.

I have now since been able to fix it thanks anyway