Large Gap At Top Of Both Side Bars

I use this theme on two sites. On one site everything words fine. On the other there is a large gap on both side bars between the header and the first widget. I tried removing all the widgets and reinstalling but I get the same gap. I don't know much about programming but if someone could tell me where to look for this problem I would appreciate it.
The web site is www.hairimplantsguide.com
I tried looking through the forum threads but I didn't see anything like this.
Thank you