winsome

Hi all, I am trying to make interior repaint for PMDG777. I tried to update their economy seats to the CX ones. I converted the dds to tga and back to dds after editing in photoshop. Meamwhile, once I enter the game, the texture only appears when the cabin lights are off. Once the cabin lights are on, all my textures are gone and the seats remains its old texture. I tried to find other texture files with the seats texture but I can't find any. Is there anything I have missed when converting the dds to tga? Attached is a screenshot for you as a reference. Thank you in advance for all your help. Winsome