[Q] Mac Spoofing not working

I have been trying to use Mac Address Ghost to spoof my address, and have been getting authentication problem error when attempting to reconnect to the wifi network.

I have confirmed that I am using a valid mac address, and that I have busybox and root.

My router is the Linksys E1200 model, updated to the latest version.

Any idea what's going wrong?

Sent from my LG-P760 using xda app-developers app