Responsive problem i cannot solve. Please help

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if you try to see responsive resulotion for instance 425x651 you will see a gap on right side when slide the site to right.

İ am searching for solution but i could not find it.

Can you help me guys this is an important issue.

Thanks.


Here is my site Read-Only: LINK
(how to share your site Read-Only link)

http://www.netcad.com/tr/anasayfa