I am setting up my first studio and am using 3 AC powered 180w/s monolights. I am using my Canon 380EX flash unit mounted on the hot shoe of my Digital Rebel XT to trigger the strobes. When I shoot a picture, it is grossly under exposed but if I shoot continuous shots the second shot exposes properly; unfortunately that method is eating card space and batteries like you wouldn't believe! I would think this is a sync issue with the strobes.
Please advise of a solution that would help with this without spending a fortune. Thanks