Flash Problems

When I'm in aperture mode with my SB800 mounted on the camera (D70s), no matter what I set the aperture to, the shutter speed seems to stay on 1/60. Why is this? It's really frustrating. Am I just being stupid?
A discussion forum - and more - for users of Digital Single Lens Reflex cameras.
https://d70users.net/
rokkstar wrote:That's the default shutter speed for flash on the D70 as well.
In order to change it you need slow sync like Des said. I didn't know you could custom set that value - will have a plough through the menus tonight.