* what's the specific problem you're having?
When trying to browse the .cfm pages on a IIS site that is connected to CF 9 it returns a “%1 is not a valid Win32 application.” error
* what sort of CF install is it (std / multi-server)
CF 9 is installed as a standard IIS installation along with our CF MX 6.1 installation.
* what sort of CF licence
CF9 Standard edition, Trial version.
* speaking of platform: what is it you're running OS-wise etc
Windows 2003 server.
As per the supported environment, CF9 is supported on Windows Server 2003. Also, you can install CF MX 6.1 and CF9 on the same server. However, did you remove the CF MX 6.1 connector before testing the same with CF9. You can't create connector to same website with different versions of ColdFusion.
Did the installation completed successfully. Were you able to access CF 9 Admin after installation. Please provide us some more information.