IIS7 URL Rewriting Problem

[interdream]

Wasn't sure on the best place to post this... went for ASP.NET because that's the language most commonly associated with IIS. However, I am using PHP on an IIS7 server.

I am trying to rewrite URLs on an IIS7 server (yes, the URL rewrite module is installed) and it works fine for simple rules, but I need it to work with a map. This is the code copied straight from the IIS website that I would have thought should work, but does not:

<configuration>
  <system.webServer>
	<rewrite>
	  	<rewriteMaps>
			<rewriteMap name="StaticRewrites" defaultValue="">
				<add key="/randomtest1" value="/rewritten/index.phpi=1" />
				<add key="/randomtest2" value="/rewritten/index.php?i=2" />
			</rewriteMap>
    	</rewriteMaps>
		<rules>
			<rule name="Rewrite Rule">
				<match url=".*" />
				<conditions>
					<add input="{StaticRewrites:{REQUEST_URI}}" pattern="(.+)" />
				</conditions>
				<action type="Rewrite" url="{C:1}" appendQueryString="False" />
			</rule>
		</rules>
	</rewrite>
  </system.webServer>
</configuration>

Sorry if the XML above formats strangely...

Anyone got any ideas on what might be wrong? Thanks!