My 2 Strobes don't want fire together

[paulo-ibiza]

Hello to all.
I have 2 sea and sea strobe. If turn only one on it works, If I turn the other one on, it works, if I turn both on, no one fires.
I have the problem with a Hugy Fot u/w case and the 2 flash are sea and sea YS-D1.
Both flash are using an independent sync cord but if I use a dual sync cord the problem also occurs.

Any suggestion for solve the problem?
Thank you
Paulo

 

[KeithG]

if you provide a little more info it may help.

i assume you mean you are using wired sync cables instead of optical. do you have a ys converter?

what settings are you using on the strobes? what type of camera and what camera settings?

 

[Ardy]

I had a similar problem years ago on my Nikon film set up. Turned out they were both trying to TTL independently and cancelling each other out. I am sure that flash technology has moved on from those days. Try them in manual if you have not already.