IIS - JK - Tomcat, and getting IIS to log the real URL

Hi,

We are running IIS5, JK and Tomcat 6.

I need to review the IIS logs to see commonly hit pages but because they are being handed over to tomcat the real URL is not logged, instead I get

...GET /jakarta/isapi_redirect.dll - 200...

What I want to see in the log is

...GET /real-url-of-page.htm - 200...

This is running successfully in another one of our environments so I know it is possible, I just can't work out what to change!

Does anyone know where it is configured to log the real URL rather than just "/jakarta/isapi_redirect.dll"?

Thanks in advance

Matt