Open the System Preferences window.
Click "Print & Fax," then click the printer that you want to delete from the list on the left side of the window.
Click the "-" button at the bottom of the list, then click "Yes" to confirm that you want to delete the printer.
then readd it:
Connect the printer to the MacBook with its USB cable.
Click the "Apple" icon in the menu bar at the top of the desktop, then click "System Preferences" from the drop-down menu. The System Preferences window opens.
Click "Print & Fax," then click the "+" button on the left side of the window. The Add Printer window opens.
Select the printer that is connected to your MacBook, then type a name for the printer in the Name box. Enter its location in the Location box and select the type of printer from the Print Using drop-down box.
Click the "Add" button to add the printer to your MacBook. If prompted, insert the printer's installation disc into the optical drive on your Macbook. Follow the directions of the installation wizard to install the printer's essential software. Click "Finish" at the end of the install process. The printer appears in the list on the Print & Fax window.
If this doesnt work, you may have to be set to default, deleted from mac all together and then reset up.
Do you have the install disk for your printer still?