The test button actually becomes the trigger no signal is required from another source.
I've read the post several times and my first impression is that the poster is attempting to trigger the Cybersyncs VIA the Canon 580EX flash.
I suspect you are mixing new flash units with old film flash technology they won't sync.
Here is my take of the subject, If you are going to use "old" flash technology which works just fine then everything from the camera needs to use the old system as well.
Canon uses an ETTL system that most manual flash units won't respond to, you would think that if the camera flash goes off then it'll trigger the slaves, not such the case.
Off camera cords that are compatible with your camera will have multiple connections at the base to communicate with the flash, however to use the older flash units they only require the center post and the mount becomes the ground.
Sorry this may get a little wordy but here goes.
I use to fire my studio strobes with a PC cord from the camera, no PC socket you can purchase a hot shoe accessory with a PC socket. Once the studio strobes fire all the lights with slaves will fire AND at the correct time.
Check you camera and custom functions it may need to "be told" to not use E-TTL function, in other fire manually. It could also be linked to the Auto Focus assist beam function. If the flashes trigger from the transmitter test button then it's a good bet it the camera flash function(s)
Normally I set studio cameras at ISO 100 shutter speed at 1/60, I'm now using a sync speed of 1/125, new camera will sync at 1/200 and 1/250 which is slightly above "some" older flash units. It would be different yes if it was a leaf shutter lens but it's not.
Using these transmitters and receivers you no longer have E-TTL it's MANUAL and the use of a light meter is needed to properly set your aperture.
If you want E-TTL then you need to buy the flash units capable of doing this triggered from the 580EX transmitter