I have recently switched to Shaw for my ISP and find that the Netgear WN2000PRT v2 extender I used previously is not functioning well. I set it up and configured it as usual but got an error message regarding security and speed (I don't remember exactly what it was) but was still able to continue. Now the link rate light is red and speeds while connected are slow. I've moved the extender a couple of times with no change. How do I fix this?