IIS7.5 with ColdFusion 9.0.1 64bit - IIS error 500

Hi,

I have the following:

Windows 2008 R2 sp1 64bit

IIS 7.5

ColdFusion 9 64bit, upgraded to 9.0.1 64bit

After installing ColdFusion 9, and upgrading to 9.0.1, I get IIS 500 errors for any file .cfm, .txt, etc.  IIS was working prior to the CF install.

Based on research, I've confirmed:

CGI, ISAPI Extensions, ISAPI filters, IIS 6 Managment Compatiblity all installed

If IIS/pplicaiton pool: Enable 32-bit applicaitons = True - Then I get IIS error 500 19 5 31 with a .cfm file, error 500 0 193 593 .txt or 500 0 193 15 .jpg.

If IIS/Applicaiton pool: Enable 32-bit applications = False - Then I get IIS error 500 0 1001 93 and an system log event 'A process serving application 'DefaultAppPool' terminated unexpecedly.  Event ID 5009, source - WAS.

I'd think enable 32-bit applicaitons should be false, since I'm using 64bit CF.  Why does the AppPool crash then?

Any ideas?