Belkin OmniView SMB Mode D'emploi page 38

Using the Remote IP Device
4.
Follow the instructions and set any relevant sliders to the same values as
set in the target server's mouse properties.
Examples: For servers running on Windows XP, go to the Mouse settings
in the Control Panel and uncheck "Enhance pointer precision" (see Fig. 14).
For servers running on Windows NT, if mouse properties were
ever changed—even if they were returned to their original
state—uncheck "Default".
5.
Click "OK". The mouse pointers should now be synchronized.
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Fig. 14 Mouse-Pointer Options (Windows XP)