How to leave space between tables border in details section

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C#4.0

reporting-services

RDLC

, +

I work in web application support rdlc report

my problem i face it that no space between borders in details section

i put all data in matrix control then it loop within it in detail section

my question how to leave space between table and another .

report picture

in red circle this is aproblem

all data adding to rectangle then adding to matrix

http://www.mediafire.com/view/1aj1r0tt7ojatdz/problem_in_report.jpg

What I have tried:

How to leave space between tables border in details section