Images from outside wwwroot not displaying (despite mapping)

For security purposes, I keep my site's images outside of wwwroot in this folder: C:\extSite\stdImages\store

Then I created a mapping in wwwroot\WEB-INF\jrun-web.xml like this:

<virtual-mapping>

  <resource-path>/extStdImages</resource-path>

  <system-path>C:\extSite\stdImages\</system-path>

</virtual-mapping>

My store.cfm page has this:  <img src="/extStdImages/store/#photoFilename#" />

The works fine on my dev site, but I just deployed to production where it does not work -- the images don't display.

Can anyone help?  Thanks in advance!

PK