I tried several options with similar problem as mine, but none worked so far.

I use Plain Yogurt. I changed the original image header with my own logo 173 x 560 pixel, resolution of 72 pixel per inch, gif format.

How do I remove the white space between my logo and the nav bar?

I've only been using Concrete5 for 4 or 5 days so if you can advise me where to correct the problem. If you can edite the exact line number of file to edit that will be really appreciated.

Link to my website. http://www.aseanexhibition.com