First the pleading..............
please, please, please, please someone help me.... i am tearing my hair out.

Here is the problem; i have 2 desktop pc's and a laptop and am attempting to connect them through a hub so they all have internet access & printer/file sharing.

Broadband modem is a Motorola Surfboard SB4100
Service provider is Blueyonder
Hub is a Genius 8 port 10Mb/s

ipconfig on all machines as follows:-

Machine A This is the only machine that has internet connection;
Ip address: 80.193.182.174
Subnetmask: 255.255.255.0
Default gateway: 80.193.182.1

Machine B;
IP Address: 169.254.224.147
Subnetmask: 255.255.0.0
Default gateway: blank

Machine C
IP Address: 169.254.46.463
Subnetmask: 255.255.0.0
Default gateway: blank

All 3 machines can connect to the internet if they are plugged directly into the modem but never more than one at a time when going through the hub.

Thank you in advance for any advice.