You may also want to try the codes for Phillips. Are you using the codes from the receiver or from the booklet?
From the book:
Magnavox: 11454, 10054, 10030, 10706, 10020, 10024, 10096, 10179, 10186, 10187, 10386, 10802, 11254
Phillips: 11454, 10054, 10690, 11154.