Vista Ultimate 64bit / 2.4GHz Intel Dual Core / 2GB Memory / ObjectDock v1.90 Plus  Build535u

I'm getting access violation error 0x7752dbba

First, the ObjectDock dock changes from no background to a dark back ground then freezes. If I log off and back on quickly I can continue computing without a Vista freezup. If not,  I have to reboot. I have never had any problems with Vista since the day it was released and installed on this homebuilt PC by the way - Help appreciated - Bob