NOT ABLE TO CREATE BACKUP OF FULL DATABASE OF SQL SERVER 2000

WHEN I BACKUP THE DATABASE IN SQL SERVER 2000, I AM NOT ABLE TO GET THE COMPLETE BACKUP. IN OTHE.R WORDS, WHEN I RESTORE THE BACKUP IN SOME OTHER COMPUTER, THE DATA I CAN SEE IS NOT COMPLETE.

SINCE MY DATA IS GROWING EVERY PASSING DAY AND THE DATABASE IS WORKING FINE, THEREFORE THE SIZE OF BACKUP SHOULD ALSO INCREASE EVERYDAY. BUT EVERY TIME I CREATE A BACKUP, THE SIZE OF BACKUP REMAINS THE SAME AND CONTAINS THE SAME DATA (WHEN I RESTORE IT IN SOME OTHER COMPUTER.

PLEASE GIVE A SOLUTION

THANKS 

RAJAN KAPOOR