CSS path after IIS url rewrite

[eluser]vertmonkee[/eluser]
I followed the instructions on this page http://codeigniter.com/wiki/Miscellaneous/ and everything works fine for removing index.php from urls.

This has now caused my CSS file to not be found. The file is in a folder structure like this from the root

assets/css/stylesheet.css

I've tried the following

http://mysite.com/assets/css/stylesheet.css

/assets/css/stylesheet.css

assets/css/stylesheet.css

But none of those options work.

My web config file looks like this

Code:

<?xml version="1.0" encoding="UTF-8"?>

<configuration>

    <system.webServer>

        <rewrite>

            <rules>

                <rule name="codeigniterRuleOne">

                    <match url="(index.php|robots.txt|images|test.php)" />

                </rule>

                <rule name="codeigniterRuleTwo">

                    <match url=".*" />

                    <action type="Rewrite" url="index.php/{r:0}" appendQueryString="false" />

                </rule>

            </rules>

        </rewrite>

    </system.webServer>

</configuration>

Can anyone suggest how to fix this? Thanks for any help