I've had my T1i for about 5 months. I never dropped it or bumped it into anything and always keep it in a case when I am not using it. Ever since I got my 430 EXii, I did not use the popup flash. However, when I tried using it today, the flash would not pop up. I tried going to the Menu -> Flash Control -> Built-in flash func. setting and it says "This menu cannot be displayed. External flash is attached.". What's up with this? The external flash is clearly not there, nor do I ever learn it on the camera when I don't use it. What do I do?