Is there a way to require or rewrite the url from http://domainname.com to http://www.domainname.com? I'm having problems with the page that has my ssl cert.

Thanks Jeff,

I ended up finding a blog post somewhere that helped me. I added the following to the web.config and it worked out fine. I had tried to use the IIS7 url rewrite tool and couldn't get that to work but this is essentially what it would do anyway (had it worked).

<rewrite>
     <rules>
            <rule name="Add WWW prefix" >
                 <match url="(.*)" ignoreCase="true" /> 
                      <conditions> 
                             <add input="{HTTP_HOST}" pattern="^domainname\.com" /> 
                      </conditions> 
                  <action type="Redirect" url="http://www.domainname.com/{R:1}" redirectType="Permanent" /> 
           </rule>
    </rules>
</rewrite>