To solve this, replace the old barcode script with this barcode script: 
Copy the new script below, then highlight the old script in your output page, then clicking CTRL+V to paste on top of the old script.
<td style="text-align: right; vertical-align: top; "><img alt="the barcode printer: free barcode generator" src="/bc.php?t=*{order_num}*&style=68&type=C128B&width=140&height=50&xres=1&font=3" style="border: none; float: right;" /><br />
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