External Hard Drive Error With Os X Panther


I have an external USB 2.0 200GB hard drive that I am using on my OSX Panther system. The computer crashed yesterday and when I rebooted I was receiving the following two error messages and the external drive was no longer recognized by the computer.

keytext error: try again with old command
PACESupport failed to start

The drive is not recognized in the disk utilities to possibly try to clean or repair.

Pro Tools recording software was running when the system crashed. Do you have any idea how to repair the connection between the external drive and the OS X system?