Not able to insert data into the database using datadriven for Post method

iam trying to do datadriven for the Post method.

  1. created Post method in Object Repository.
    2 set the user variables to one of the field.
  2. created test case.
  3. passed the variables from the post method.
  4. created excel sheet and defined the variables same as in the test case.
  5. created datafile
    7.created test suite and ran the suite. Succesfully ran the Test suite but the data is not inserting to the database from the data in the excel file.