Do I need separate subnets?

Hi,

I have the following hardware:

ROOM1:

DSL modem, 192.168.1.250 Buffalo AirStation 54G, 192.168.1.251 PC{1,2,3}, 192.168.1.{1,2,3}

ROOM2:

Buffalo AirStation, 54G 192.168.1.252 PC{4,5,6}, 192.168.1.{4,5,6}

ROOM3:

Buffalo AirStation, 54G 192.168.1.253 PC{7,8}, 192.168.1.{7,8}

All the PCs have a default gateway of 192.168.1.250 and I can get internet access without any problems on all of them.

My problem is that the PCs in rooms 2 and 3 can ping the Room 1 equipment but not each other.

Even the PC's in room 3 cannot ping each other even though there plugged into the back of the same AirStation.

Any idea as to what I'm doing wrong?

Thanks, Steve.

You solved it in one.

Thanks.