CSS IE 7 Problem :( HELP PLEASE

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Joined: Jul 2010

Hello Guys, I'm trying to figure out what I'm doing wrong in this page http://www.gavalian.com/upbids
I'm new to CSS and this is my first try to make site without tables.
the "CLOSING AUCTIONS" tab in internet explorer 7 overlapping banners that are on the top, please can you review code and let me know if i'm doing something wrong ?

Thanks