Poa representing in family court

Hi, In the divorce case filed by me respondent wife filed counterclaim application alongwith affidivit of examination for cross and both were signed by her power of attorney. judge rejected the application stating that the party in person has to sign the affidavit. She has gone to high court in appeal of this order. my question is 1. can POA sign on behalf of party on the affidivit ? 2. whether the judge is right in rejecting the application or the same should be allowed or he should tell the respondent to make the necessary changes. 3. An affidivit once submitted can it be withdrawn and refiled ? 4. Can a party submitt her cross examination via video conference or physical presence is required. Tks