bbwin central mode does not generate clock.rrd

Is there a way to get the clock.rrd generated from a bbwin client (.12 or
.13) running in central mode?  The client reports clock, but xymon doesn't
generate clock.rrd like it does for a linux or unix host.  It would be nice
to graph the clock offset for windows hosts too.

Clock output from bbwin in central mode:

[clock]
epoch: 1328326750
local: Fri Feb 03 22:39:10 2012
UTC: Sat Feb 04 03:39:10 2012

Clock output linux client

[clock]
epoch: 1328326887.763926
local: 2012-02-03 22:41:27 EST
UTC: 2012-02-04 03:41:27 GMT


Thanks,