VB 6.0 --> Report Desinger

I would like to add 2 grouping header in the same datareport but once I added the 2nd grouping header the runtime error message "Report Section do not match data Source" prompted out!!!!!!! Anybody please HELP !!

The following are steps that i had tried on:

(1) the connection was build thru dataEnvironment (and its
confirmed working)
(2) added a new report
(3) set the datasource and datamember to the report
(4) insert a new group header/footer (A)
(5) retrieve the structure of the report
(6) insert another group header/footer (B)
(7) Drag in data_grouping_field from dataEnvironment into
header (A) and (B) respectively.
(8) Run the program and the following runtime error prompted
out.--> "Section do not match data Source"

Should this be the correct way to add in a new grouping header?
VB 6.0 --> Report Desinger