your code is a TOTAL MESS ...
you can't mix and match the code as you wish
1. get rid of the <center> </center> tags they are deprecated
2. get rid of the width: 179px; where you have it is WRONG
you should use ids for each div and give them individual widths or put those widths in the .box css definition
3. read the w3schools.com you cann't just throw a few html and css tags and expect it to work
4. consider using dreamweaver
5. get the code you like from
http://blog.html.it/layoutgala/
6. if you get something working CHANGE one think at a time and test to see if you SCREW the design with you addition, if you did UNDO, read about the change that you did and see how its done correctly
7. consider buying a book and start from the beggining
8. get a nice layout from places such
http://oswd.org and modify it always remembering 6.
9. I could go on forever ... but if you are serious about web design ... you have to start reading, you can't expect other people to do it for you, unless you are the manager of a website company.