Main banner is off-center

The main rotating banner on my site is off center. In the code it says it is absolute, and all I can think that would have set it off center was my playing with the main menu bar background picture.

Try centering as show, should fix your problem

<center>Place your ad code</center>

Where? I cant add that in the css as it does nothing so I put it back to absolute. Any other ideas?

Here is my site. Sometimes the banner is dead one, sometimes its not. Also, it is NOT the banner itself. :/

http://www.guttercandy.org/

In the Admin Panel when you place your Banner Code, that is where you do what handsconnect said. 

That did the trick, although I lost most of the banners original functionality. I will have to play with it a bit to get it back to normal.

Any ideas what could have caused it to start to be offcenter?

Base code problem.  Happens all the time.