How to show timestamp with milliseconds(3 digits) in Select clause in Ver7.1 ?

This is the query and result:

select h323_setup_time from pv_legs_new where h323_setup_time = '2003-01-01
00:43:59.996-05';

h323_setup_time
---------------------------
2003-01-01 00:43:60.00-05

Actually, the real data of second and millisecond is 59.996-05, but it shows
60.00. I failed to load it when I use this result in other query.