Your subnet 192.168.1.128/25 does not include these addresses

Try :

subnet 192.168.1.0 netmask 255.255.255.0 {
  option routers 192.168.1.1;
  option domain-name-servers 192.168.1.1;
  option subnet-mask 255.255.255.0;
  range 192.168.1.150 192.168.1.220;
}