Keyboard hangs w/ Belkin Omniview & Dell docking station...

I have two computers connected to a Belkin OmniView 4 port KVM switch
box. All mouse & keyboard connections are PS2. The computers are a
desktop and a Dell Latitude D600. The cables are being connected to
the Dell docking station. My keyboard is a Microsoft Natural keyboard.
When I switch between the two systems, I lose the keyboard
functionality on the laptop. The Desktop continues to work.

To troubleshoot this, I have uninstalled the keyboard driver on the
laptop and reinstalled, & rebooted. In Device Manager (under
'Keyboards') it says I have the following keyboard: Standard
101/102-Key or Microsoft Natural PS/2 keyboard. The laptop keyboard
responds, it's only the keyboard connected to the Belkin switch that
does not function.

Any comments / solutions welcomed.