CSV import not working

Hi all,

I am trying use data import feature of DHIS. It seems not working. Whenever I try importing a CSV/XML file it says successful import but data is never updated.

For ex:

I exported a dataSet using DHIS export so that file with correct format could be used. In that file I left everything unchanged except values. means that in those files I changed values of each and every dataElement. On importing that CSV/XML file it says rows updated but in real datavalue table doesnot reflect updated data. Plz let me know if I am looking into wrong table.

Many thanks,