updation made in table not getting reflected in CDHDR

Hi friends,

I am new to ABAP. I want to write a report which will display changes(updation of data) made in my table. I tried to write prg using table CDHDR. but whatever updation i am doing in my table(user created) is not getting reflected in CDHDR.

Can anybody please guide me how to do this program.

Thanks in advance