Problem in header line in IE?

Hi all,
See the site,
RFCables.org

In Mozilla and chrome, below the logo and above the menu a horizontal line is showing…
Where as in IE it is not showing that.
Why?

Give me some help to overcome this…

Thanking you…

This is really very old-school web design, venkat6134. Rather than rely on table heights and hope for the best, it would be better to use something like border-bottom to create a line like that. But I would get rid of all the tables, <font> tags and so on first.

Ya, it is developed in long back…
I didn’t change the presentation much… but i added the functionality and some features using PHP. I don’t have much idea on CSS, thats why, i am unable to overcome this problem…

Please give me the solution to solve this…
Thanking you…