IE 6 only displays right sidebar incorrectly

In IE 6.0 and only in ie 6 my site does not display correctly. It works in IE 7, firefox and Opera. The sidebar shows up on the top of the site rather than the left hand side
http://www.yourcomputerconsultant.com/test/plantilla1.html

The actual page is a PHP page but this stripped down original html shows the same issue using my current css

 

I´m not sure because i´m tired but you have

#colRight {
width: 530px;
float: left;
}

should´nt it be float:right;