Differential backup issue
I am using differential (using archive bit) backups and it appears its not backing up modified files. Here is what Im seeing. I performed a full backup on 1/16/07 and it succeeded. I then changed the backup to differential. I modified a file on 1/1707. The differential then ran that night on 1/17/07 and it succeeded. When I go to restore and choose the differential backup set.. my file that modified 1/17/07 is not there. If I go to the full set I see the file, but its before it was modified and shows the date 9/5/06. What am I doing wrong? I appreciate any help. Thank you.