"Pin not valid" is nothing to do with the MAC address, the system has been dicky since Saturday with pin numbers and I've spent all week validating the ones I've had
Could be as simple as that if you would like me to have a nosey tomorrow morning ??
The powers that be can confirm I'm genuine
Also, dependant on the area that you're in, could mean that you're not charged for anything till you register so may be cost-free so far......