Question about Q2 and SF 60 Flash

[witchcityimages]

Advertisement (gone after registration)

Hello, I am wondering if someone could help me. I am using a Q2 with an SF60 Flash. The camera is set to aperture priority and a fixed ISO. Using TTL mode on the flash I can't seem to set a minimum shutter speed. With my Nikon set the same way as soon as I attach and turn on the speedlight the shutter speed is fixed at 1/60th of a second. With the Q2 when the flash is attached and turned on the shutter speed is remains very low, 1/15 or 1/30 of a second. As with most issue with my camera, the camera is much smarter than I am and I am missing something that may be obvious. Any helpful suggestions are welcome. Thank you.