Configuration :: Setup Debug And Release Builds On The Same IIS?

I'm on Windows Server 2008 with IIS 7.5 I have set up two web applications on the web site; one for the debug-build and one for the release-build for our system. I have not been able to figure out how to setup the two web applications so that they do not share the same native module.

When I access the debug-application (http://dev1/debug) it loads "G:workspaces ewreposdebuginRXWeb.dll" and the site works fine. However, when I access the relase-application (http://dev1/release) it also loads the "G:workspacesewreposdebuginRXWeb.dll" which is not want I want. I want it to load the "G:workspacesewreposeleaseinRXWeb.dll". Apart from that the relase-application works fine, loading for example its own database, javascript-files, images and so on.

I have tried many different configuration but obviously there is something I do not understand.

These are the changes I have made to applicationHost.config:

Under the section <globalModules> the following to rows are added at the end:

<add name="RXDebug" image="g:workspaces
ewreposdebuginRXWeb.dll" />
<add name="RXRelease" image="g:workspaces
ewrepos
eleaseinRXWeb.dll" />
The web.config for the debug-application looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>............