Problem with AF-360FGZ Flash

Are you sure the flash is fully recharging in between shots ?

There are many solutions, here is an example:
http://www.pocketwizard.com/products/cable_accessory/flash_sync_cables/

Are you using rechargeable batteries or alkaline ?

You may download the manual here.

The istD camera requires a flash capable of pttl readings...is the Quantaray a pttl flash unit?

Flash tube is probably burned out.

keep the camera mode MANUAL

take a silver paper and put in front of the slave censer when you take the photo flash on camera as master should go on silver paper OR used slaveunit

The answer to your question can be found at...

This website

All but the very best flashes can not recycle atthat flash rate. For burst mode, you probably want to use focus modeAF-C or AF-A.
Morris

Page 73 in the manual; If the flash fires in L or H mode (pg. 65), only one picture will be taken each time the
shutter-release button is pressed. The shutterrelease may be briefly disabled to protect the flash after it has beenused for several consecutive shots. The flash can be used again after ashort pause.
The flash can take several seconds to recharge andduring that time the shutter is disabled. NR will also reduce thenumber of frames per second that you can take, and of course yourshutter speed has to be fast enough to allow for 4.5 fps.
In AF-S the shutter won’t fire unless the camera has achieved an in-focus state and the focus is locked.
In AF-C the camera continually focuses, but that isnot the same thing as being in focus. As you move the camera or yoursubject moves, the in focus state will come and go, but the camera willattempt to continuously re-focus. BUT, the shutter will fire even ifwhen the AF system has lost the in-focus state and the picture is outof focus.
In the D90 manual it indicates that the AF-A modewill only fire when the green in-focus light is on, just like in AF-S.The problem is that you probably won’t get 4.5 fps unless both thecamera and the subject are stationary and no time is lost between shotswhile the camera re-focuses.
--
Brooks
http://bmiddleton.smugmug.com/

I've found that the *istD underexposes ( as it should metering 18% grey ) light subjects, or with light backgrounds. A white wall using TTL ( AF500ftz ) behind any subject it always turns grey! You need to manually adjust 1 stop over. With dark subjects, overexposing with out blowing out much. If your used to the metering from a PS digi cam the *istD takes a bit of getting used to.