how to change the URL in msn SERP?

i have a website,when i search the main keywords,it shows the URL like this http://www.mydomaindotcom/xxx.htm,what can i do to change this to the homepage of my site( http://www.mydomaindotcom/).
in fact almost all the BLS link to the homepage.

 

You cant. The SE will index what pages they see relevant.

If you optimise your pages you can alter what pages are more likely per keyword.

 

thanks kalyse,seems i have to edit this page's title to attract more traffice.

 

Is the xxx.htm your index.htm? If it's not that's the problem of your page content.

 

xxx.htm is not the index.htm(default.htm).
i prepare to do some test,change the title or content of xxx.htm.to tell what effect this.