DHCP and 2 subnets

[goose bla]

hello,

I have router with inet and allias. 10.1.0.0/24 10.2.0.0/24.
i want allot to pc(client) their IP by their MAC adress. but it's going 
only with one subnet. i can allot IP only to one subnet.

this is running 

subnet 10.1.0.0 netmask 255.255.255.0 {
range 10.1.0.31 10.1.0.60;
  default-lease-time 600;
  max-lease-time 7200;
  option subnet-mask 255.255.255.0;
  option domain-name "bla.org";
  option domain-name-servers 222.222.222.22;
  option routers 10.1.0.1;
}

host pc1 {
        hardware ethernet 00:33:11:22:bb:94;
        fixed-address 10.1.0.10;
}


but i need somethink like this:

subnet 10.1.0.0 netmask 255.255.255.0 {
range 10.1.0.31 10.1.0.60;
  default-lease-time 600;
  max-lease-time 7200;
  option subnet-mask 255.255.255.0;
  option domain-name "bla.org";
  option domain-name-servers 222.222.222.22;
  option routers 10.1.0.1;
}

subnet2 10.2.0.0 netmask 255.255.255.0 {
range 10.2.0.31 10.2.0.60;
  default-lease-time 600;
  max-lease-time 7200;
  option subnet-mask 255.255.255.0;
  option domain-name "bla.org";
  option domain-name-servers 222.222.222.22;
  option routers 10.2.0.1;


host pc1 {
        hardware ethernet 00:33:11:22:bb:94;
        fixed-address 10.1.0.10;
}

host pc2 {
        hardware ethernet 00:44:44:22:bb:94;
        fixed-address 10.2.0.10;
}