Waking up in the dock using the Power button no longer works

[xingray]

I have the following problem:

The MiniDock of my T60p stopped detecting when I dock the laptop in sleep mode. Before my reinstall of Windows XP, I could dock it, the docking LED would light up and I could wake up the laptop using the power button. Now the dock doesn't react anymore when I dock the laptop - and pressing the power button after docking turns off the sleeping laptop. (!) The only way to wake it up without activating the LCD screen is to open the lid just a little bit and press the Fn key, which kinda sucks.
I tried all power management driver updates etc., no changes. The Keyboard utility also doesn't enable any hotkeys when docking in sleep mode.
Any hints are really appreciated.