vista taskbar & launch bar icon order changes

On one of my Vista Ultimate (32 bit) systems the order of the icons on the

launch bar changes when I reboot my system. Also the task items gets pushed

to the far right. I've unlocked the taskbar, moved the task list under the

lauch bar, arranged the icons on the launch bar as I want to see them. I

then lock the taskbar, and reboot my system. Upon reboot the icon

arrangement is messed up and the running applications appear on the far

right. I've searched for a solution but cannot find anything, possibly I've

looked in the wrong places. Sugggestions would be appreicated