I hope I am posting in the proper spot, and I really hope someone can help me. I purchase a pre-owned (I know, first mistake) 450D with lens kit and a 430ex ii earlier this year. Up until now, I've not really needed to use the speedlite, but now I absolutely need it as I've had to move my photography indoors for the winter season. My first shoot, it worked flawlessly. But since then, I've been having problems getting it to fire. The pilot light doesn't light up at all. I have brand new, fully charged rechargeable batteries in it. Could they still be at fault? Should I purchase a new set? I don't have the time or money to purchase a new speedlight, or unfortunately studio lighting. I had three sessions today, and the light only worked for about 5 of the first session's photos. It comes on, I can change all of the settings, the batteries are in correctly, it is locked into my camera, it's not turned off on the camera. I just don't know what to do. I have another shoot tomorrow and I really need my flash. Any help/advice/suggestions would be wonderful.