Form Personalization in Bank Statement Reconciliation form

Dear Expert,

My requirement is in Bank statement Reconciliation form when we click on lines button the line level information it should shows the Unreconcilied transactions based on the responsibility.

I have tried with WHEN_NEW_RECORD_INSTANCE trigger through form personalization but it's not working.

Could you please suggest me the best approach to resolve this requirement.

For your reference I'm attaching the screen shot.

Thanks in advance.

Reagards

Venkat.