Try the followings:

• Print labels so that barcodes are placed in the direction as shown below:

  1 Tape feed direction



• Try using another scanner.
   
• We recommend printing the barcodes with [Standard] selected from the [Quality] options if small characters are not included.
  If small characters are included, we recommend printing the barcodes with [High Quality] selected from the [Quality] options.
  
  To display the [Quality] options:
  1. Open the printer properties. (To learn how to open the printer properties, see “How to open the Devices and Printers window.”)
  2. Right-click the printer you want to set up, and then click [Printing Preferences].