Since the xigncode error you're receiving ends in "B", that means that the cheat is getting detected, it has nothing to do with you getting "banned" lol. You don't need to use a VPN (hotspotshield.)
Try using the bypass I've provided here, it's automatic, no need to spam numpad 7. I put instructions in that thread, start the .CT bypass before launching AVA, should be good to go, it doesn't matter if you start this cheat (UAV_NO RECOIL) before or after starting the bypass, just make sure both are started before AVA is launched. Post back results.