I have a Vivitar 736AFC flash that I always used without any problem with my EOS Elan/100 and EOS 500 (sorry, don't know the american name
). Tonight, I tried to use it with my 350D/XT and... nothing happened, The camera didn't seem to recognise the flash. Both were ON, I tried in different modes. Is there a parameter I should change in the camera. Or are they incompatible and I should buy a new flash (I hope not
)
Thanks for your help!

