Originally posted by Murfy Delay was off but I noticed that range was set to long so I set to short.
Did that fix the issue?
If not, try using "M" (and a shutter speed not faster than 1/180s) or "X" on the camera to ensure that you are not exceeding the sync-speed.
The hot-shoe cannot overheat, so that's definitely not the problem.
Do you have a PC-sync cord with a connector that fits the V6? If so, you could try triggering the V6 via the PC socket of the K-3. If that works then you know that there is a hot-shoe connectivity issue.
N.B., there is an older firmware for the V6 (starting with 1.) that uses an older flash protocol. If you use the matching firmware on the flashes, the V6 will still work without loss of functionality. The V2 firmware version is useful to make the V6 (somewhat) compatible with the V6II but if you don't need that compatibility, the V1 firmware may work more reliably for you. If nothing else helps, you may try to change the firmware versions on the V6 units and the flashes to older ones, using the older flash protocol.