Anyone have Fuji flash for their X-E1? Could you test something for me?

Hi guys, if you have a Fujifilm branded flash, could you test the flash setting for continuous shooting on your X-E1 for me. I have an off branded flash that only fires in single shot mode on my X-E1. When I switch to continuous mode on the camera (both 6 and 3 fps), the flash option in the menu is grayed out. I have tested the flash on an Olympus EVIL/mirrorless camera and the flash has no problem firing at 3fps, the max speed for the Olympus.

I would like to know if I have a Fuji flash such as EF-42 and EF-X20, would the camera allows me to go into continuous mode and still using the flash.

Thanks guys and Merry Christmas.