fluid content pushes down fixed right sidebar

[falconet]

Look at this url:http://kraken.ikas.sk/and compare to:http://kraken.ikas.sk/autorizovany-servisWhy is my fixed right sidebar dropping under content? Css seems to be exactly the same.I need fixed sidebars (180px) and fluid content.If there is no sidebar on the right, the content must stretch to the right to full width.