Report multiple Dataitems

Hi , I am facing a issue in report data items ,actually I have three dataitems which are connected with a one dataitem(parent), other two dataitems contain multiple records which has to be shown in report in group of table , but It shows empty muliple lines in tables of report . I need to show only one dataitem to one table in report layout and other one in other table group of report layout but It shows multiple empty lines in both report layout tables. How to resolve this?

Thanks in Advance
Ankit