I wonder if someone might be able to help me with a Speedlite problem. I have 2-540EZ's that I use to remotely trigger from my 400D (Rebel xTI). They are just cheap triggers and remote bought off of eBay, but they worked for what I needed them to work for. Now I have a 5D original, and I can't get the Lites to fire remotely. I know the SL's and remotes are still working, because I've checked them on the 400D, but they won't remotely fire from my 5D. I don't know if I need to change something in the settings, or these Lites are incompatible with the 5D. Any help would be greatly appreciated. Thanks in advance.