You may need to ‘think outside the box’ with regards to the arrangement of the boxes…
ROT13 hint (use ROT13.com to read):
Lbh pna chg bar obk qverpgyl ba gbc bs gur bgure
Solution:
Vs lbh chg gur sybngvat obk ba gur obggbz, vg jvyy yvsg hc gur aba-sybngvat obk ba gbc bs vg