Q & A plugin 404 errors on IIS

Hi, I have looked at and followed instructions listed on these 2 posts to no help at all

https://premium.wpmudev.org/forums/topic/qa-problem-404-error
https://premium.wpmudev.org/forums/topic/just-getting-4040-errors

I'm still getting the 404 error...

I've disabled all plugins, switched to the default theme, and changed the permlinks several times... none of these help.

Using: WP Version 3.1.3 on a Win Ser 2003 with IIS6

I've gotten other plugins and the site to work fine, just can't get this plugin to work.

Any additional thoughts other than what has been mentioned in the URLs above?

Thanks.
Shane