Question about Fuji F30 and strobes

I've got a Bonica Neon II kicking around, and am trying to get it to work with my Fuji F30. I've confirmed that the strobe is being triggered by the camera's flash, but I'm having serious exposure problems. Pictures are basdly underexposed -- almost as if the flash isn't working at all.

The camera does not appear to be doing a pre-flash. Red eye is turned off. I've tried a number of shutter speeds for synchronization to no avail?

Any ideas why it isn't working?

Thanks!

It could be due to the fact that the camera has indeed a pre-flash but it is just so close to the actual flash that it can not be recognized by the human eye as two different flashes.

Just an idea, try experimenting with that, I have the F31 but have never used that with a strobe.

Yeah, a preflash would definitely explain it. I checked the manual, and it didn't mention anything about how the flash operates. Anyone here know if the F30 has a preflash, and, if so, can it be turned off?

Thanks!