Echo %date% doesn't work in Windows NT 4.0

Hi all,

I'm new to this forum
I want to create a batch file that export my oracle database. The export file must be named with current date and time like this

Date 06/19/2008 Time 10:12:15.5
File Name MyFile_19-06-2008_10_12_15

I wrote a batch file which works fine on Windows XP
But in windows NT

MY_FILE_NAME=MyFile_%DATE:~7,2%_%DATE:~4,2%_%DATE: ~10,4%-%TIME:~0,2%_%TIME:~3,2%_%TIME:~6,2%

This command doesn't work.
I want to store current date and time in a variable so that I can extract Day, Month, Year, Hours, Minutes and Second separately.

Please help me in this
Thanks & Regards
Manoj