I recently purchased a suspiciously cheap flash remote trigger system called Jianisi PT-04TM for about $20 and set it up with my Canon EOS 40D and Sigma EF-530 DG Super external flash.
The surprising part is that I got it to work... kind of. If I position the wireless receiver and flash gun just right, it triggers when I want it to. However, if I attach the flash all the way into the receiver's hot shoe, the flash immediately starts to fire continuously.
This has led me to the conclusion that the receiver's hot shoe is causing some of the connectors on the flash gun to short circuit. The flash has five connectors located right next to each other, but the hot shoe only has one large one - and the shoe itself is metal. See picture below.
The stuff that's peeling off is transparent adhesive tape. Since I'm posting this you may have guessed that didn't help.
For reference, this is what the flash gun's connectors look like.
Is there something that can be done to get the wireless system working without draining the batteries on the flash while looking for the "sweet spot"? Or should I just toss it and get either a decent remote trigger system or another flash gun to set up as master?