Dynamics AX 2012 Portal Install Problem

I am trying to install the DAX Enterprise Portal into an existing SharePoint 2010 farm.  I start the install, all of the prerequisite checks are green.  It runs for a while and then errors out with this error:

2012-07-06 09:35:06Z            Creating new application pool SharePoint_80_471a3954311b4627a74e19ba4f6a4e8a
2012-07-06 09:35:16Z            A new application pool SharePoint_80_471a3954311b4627a74e19ba4f6a4e8a has been created and set to run under Cxxxxx\DAX.Proxy.
2012-07-06 09:35:16Z            Configuring SharePoint Web application to use application pool SharePoint_80_471a3954311b4627a74e19ba4f6a4e8a
2012-07-06 09:35:16Z            Setup could not retrieve the Web application for Web site http://COM-SPFRONT1. The Web site is extended in SharePoint.
2012-07-06 09:35:16Z      An error occurred during setup of Enterprise Portal (EP).
2012-07-06 09:35:16Z      Reason: Setup could not retrieve the Web application for Web site http://COM-SPFRONT1. The Web site is extended in SharePoint.
2012-07-06 09:35:16Z      Registering tracing manifest file "C:\Program Files\Microsoft Dynamics AX\60\Server\Common\TraceProviderCrimson.man".
2012-07-06 09:35:16Z      WEvtUtil.exe install-manifest "C:\Users\SP.Administrator\AppData\Local\Temp\2\tmpEC3F.tmp"
2012-07-06 09:35:17Z            **** Warning: Publisher {8e410b1f-eb34-4417-be16-478a22c98916} is installed on
2012-07-06 09:35:17Z            the system. Only new values would be added. If you want to update previous
2012-07-06 09:35:17Z            settings, uninstall the manifest first.

Any ideas?

Thanks