Exchange OWA stopped working!

The other day i noticed that outlook web access was not working on my test Exchange server.  After googling around and looking at Exchange, it seemes as if something (windows updates for .Net framework?) flipped IIS over to use 32-bit mode, and OWA needs IIS in 64-bit mode.  Following a post on the internet i tried removing the CAS role and re-installing it, got this error:

Error:
The 32-bit ASP.NET is registered to IIS. This will cause an Outlook Web Access (OWA) access error. Run 'aspnet_regiis -r -enable' from 'C:\WINDOWS\MICROSOFT.NET\FRAMEWORK64\V2.0.50727' to resolve this problem and rerun setup.

After taking care of that and re-installing the CAS role, outlook web access started working again.  Thanks to this article for the help.