In reply to sumiya.

Sumiya is this page online? If you can put it online and send me a link I'll take a look.

My first thought is the widths aren't adding up and not leaving enough room for one of the columns. That usually ends up being the issue. It looks like you tried to account for that, but it's hard for me to see looking only at the css.

Post a link or feel free to zip everything up and send me an email and I'll take a look and see if I can spot the issue.