BrowserPrint truncates FedEx tracking number barcode

We have a strange problem.

When we print zpl from fedex shipping label to a zebra 505 printer via tcp/ip everything works fine. When we use BrowserPrint to print the same zpl over a USB cable the FedEx barcode for the tracking number runs off the side of the label and is not scannable (same printer). It looks to me that the barcode is a different symbology or something. i.e. the bars look different over USB vs TCP/IP for the same string.

We tried changing the zebra config "Print Width" to 750, 800, and 832, no luck.

Does anyone have any ideas.

p.s.

We are using the USB in a backup mode. Our network fiber was cut to one of our main warehouses.

Thanks for any help or ideas,

Rob Reiss