Decodeing url after url rw-write

Hi,

I have setup a  URL Re-Write and below is the snippet

<rule name="Example" stopProcessing="true">
                    <match url="(.*)" />
                    <conditions>
                        <add input="{CACHE_URL}" pattern="^(https?)://" />
                    </conditions>
                    <serverVariables>
                        <set name="HTTP_Authorization" value="Basic xxxxxxxxxx" />
                        <set name="HTTP_Accept" value="application/rss+xml" />
                    </serverVariables>
                    <action type="Rewrite" url="{C:1}://xyz.domain.com/{UrlDecode:{R:1}}" appendQueryString="true" logRewrittenUrl="true" />
                </rule>

I am tryin to decode the url for R:1, but re-writted url is not decoded before submission. I am looking for a solution where I can decode the url and submit the request. can anyone help on this ?

Thanks,

pravekal