How to print EPL barcode vertically in asp.net web application?

Question

How to print bar-code in vertically direction through PRN File?

Printer : Zebra GC420t EPL

I had designed the Barcode using Zebra Designer code and generate the prn file. But when I Print barcode, print comes in Horizontally format,I had made changes printer property still not coming vertically, My Barcode Sticker is 5 cm (Width) X 27 cm (Height)

Below is my prn file code

I8,A,001


Q0001,0
q831
rN
S2
D15
ZT
JF
O
R0,0
f100
N
A495,174,2,1,1,1,N,"1"
A494,107,2,1,1,3,N,"1"
A764,103,2,4,1,1,N,"Vehicle No : "
A766,176,2,4,1,1,N,"Container No : "
B780,379,2,1,7,21,160,N,"$Zendor"
X0,399,1,0,400
P1

How to do? kindly help. I had to make any changes in PRN File? Kindly Suggest.