Windows 8, Targus APC71USZ, Sleep

[Hickhaven]

I have been running the Targus APC71USZ USB 3.0 docking station for about Nine months. It is connected to an HP Envy dv7 and two HP 2311x external monitors. Operation has been flawless until the latest displaylink software update. When the laptop used to enter sleep mode or the screen was put into sleep mode, the external monitors would also enter sleep mode and remain that way untill the computer was woke up. After the latest update however, the monitors initially go to sleep, then almost immediately restart and search for a signal, enter sleep mode, restart and search for a signal etc ... I now have to disconnect the power supply to the docking station in order to put the monitors to sleep or turn each monitor off individually. I have tried running a restore to the point before the displaylink software update and removing and re-installing the the displaylink software with no change. It is almost as if the update changed a setting in the docking station itself??
Any information or recommendations would be greatly appreciated.