Our WiMax connection keeps turning on and off every 90sec or less, according to @Talk2Globe twitter account all network lines are normal and functioning well. No outage found in your area. I've done all the the troubleshooting guidelines from tatoo's website, but the problem is still there – for lamost 3 days we are experiencing this. I checke the event's viewer on windows there is an error that says "The IP address lease 192.168.254.100 for the Network Card with network address 0x0013771CD404 has been denied by the DHCP server 192.168.254.1 (The DHCP Server sent a DHCPNACK message)." Location: GenTri, Cavite. Thank you in advance for any solution you can provide.