The error code 10660 is defined as, No application found.
Verify that the application exists on your hard drive. If the application is installed on the server, remove from the server and use your CD to install locally and apply any patches as necessary.
If the application is not on the server and is on the local drive:
Use the Get Info window in the Finder program to assign the correct application to the files that you are trying to launch.
Launch the application on your hard drive and then Open Company within the program itself.