Even if you can prove that the Affidavit is false, PERJURY is not attracted. Perjury is attracted only if something is done in the Court, not outside. The Affidavit was executed outside the Court and produced in the Court afterwards. Had it been in the custody of the Court and had it been manipulated while it's in the custody, only then is Perjury attracted.
FORGERY is, however, attracted in your case.