Case C-404/04 P: Judgment of the Court (Second Chamber) of 11 January 2007 — Technische Glaswerke Ilmenau GmbH v Commission of the European Communities, Schott AG (formerly Schott Glas) (Appeal — State aid — Article 87(1) EC — Contractual promise of payment — Disappearance of an essential condition of the contract — New pleas and arguments — Substitution of reasons — Application for the hearing of witnesses — Test of a private creditor — Grounds of the judgment of the Court of First Instance — Determination of the amount of aid — Article 87(3)(c) EC — Right to be heard — Breach, in respect of the Member State concerned, of the rights of the defence)