I am trying to use an external flash with a wireless transmitter. The transmitter goes into the hotshoe fine. The issue is that the on-board flash tries to pop up and can't, because the transmitter is in its way. However, this keeps the flash from firing; the flash light (lightening bolt) is greyed out. I've confirmed that this is because the flash can't popped - Without the transmitter attached, the flash pops up and the lightening bolt isn't greyed out. When I gradually push down the flash, when I get about halfway down, the lightening bolt becomes greyed out and the flash refuses to fire. So, I need some way to force the transmitter to send the "flash" signal, even when the onboard flash can't pop all the way up.