My trackpoint double click won't work.

[ktla22]

I recently bought the used t520 and it's running on window 7 64bit system.
Under the UltraNav-trackpoint-setting- trackpoint properties,
I checked Enable Press-to-Select but trackpoint double click would not work.

I updated the driver to the latest one but didn't work as well. Trackpoint works well
other than the double clicking issue. Enabling and disabling the touchpad had nothing
to do with the trackpoint neither. Would there be a fix to it?