Printer doesn't print entire web window

I have an HP Deskjet 5550 printer, and when I print a page from a website, even though the whole page shows on the computer screen, when I print the same screen, much of the right hand side is cut off. How can I fix this?

 

In Internet Explorer, go to File>Page setup and incrementally decrease the margins until it prints the entire page. These settings will affect the margins when printing email from Outlook Express, too.