Debtors filed an objection to claim 4 of Household Finance Corp. and motion to avoid security interest as an undersecured second mortgage under 11 U.S.C. § 506(a) and (b). The Court overruled the objection and denied the motion to avoid the mortgage holding that it was improper to attempt to avoid a mortgage pursuant to Bankruptcy Rule 3007 instead of utilizing the correct procedure of an adversarial proceeding according to Bankruptcy Rule 7001. Rule 7001(2) specifically states that "a proceeding to determine the validity, priority, or extent of a lien" is an adversary proceeding and a lien should not be avoided through an otherwise properly noticed hearing on objection to claim.