It's possible that you installed drivers from the incompatible CD-ROM with Mac OS X 10.5 or greater.
Uninstall the drivers and try the driver reinstallation following the steps below:
NOTE: Illustration shown below is from a representative operating system and may differ from your operating system.
- Click Apple Menu => System Preferences... (If you are using a USB cable, be sure to disconnect it.)
- Click Print & Fax or Print & Scan.
- Delete the driver and close Print & Fax or Print & Scan.
- Go to the Downloads section of this web site and install the latest printer driver. The installation instructions are available in the Downloads section.