I bought one of these a while back as I was sure i must need one 
(you know the feeling)
Anyways I have just got this out to try and use it.I am having a problem getting the flash to fire. I am using the 580 ex on the end of the lead set to ettl mode, Camera in Manual set to 1/200th sync speed.I can hear the zoom head moving when I zoom the camers lens plus the range distance/ aperture on the back of the flashes lcd is working but the flash will not fire.
Am I doing something wrong ?
Help please?
Gaz
(you know the feeling)
Anyways I have just got this out to try and use it.I am having a problem getting the flash to fire. I am using the 580 ex on the end of the lead set to ettl mode, Camera in Manual set to 1/200th sync speed.I can hear the zoom head moving when I zoom the camers lens plus the range distance/ aperture on the back of the flashes lcd is working but the flash will not fire.
Am I doing something wrong ?
Help please?
Gaz