Chapter 10 No lamp

I am currently stuck in chapter 10- my inventory says am carrying the lamp and my oil level is full but I cannot "light" it. Pressing the button to light and raise it does nothing. It has worked fine in previous chapters. Obviously I need it to complete the glyph objective. Have I missed something? Playing on xbox one.

Forget it- i was being an idiot- sorted now. All good- enjoying the game.