I have a Quantaray QTB-9550U that I try to use with my XT. Problem is, it doesn't go off half the time. Even when the ETTL light is on (The one that indicates the flash is working properly with the camera). Doesn't matter what mode the camera in in. I normally on use the creative modes, so it should always go off. I'd go ahead and replace it, but it works fine when it wants to. And I can't afford a better one right now.
Does anyone have any suggestions?

