I tried to use wifi script on mangOH red board, with newest FW 13.X and it does not work. I have already mentioned this issue on forums, but there were no solution for that problem. MangOH RED 77 - Wifi Client config
Considering that, I believe that gopalagowda's problem is not related with bad PCB design.
The real problem is that Sierra doesn’t really care about problems with their software…