Internet Connection Sharing not working for no reason!

Hi all

I am having some problems with my Home network.
All 3 computers are using Windows XP and i am using a 5 port workgroup hub.

When i try to chose the option "Obtain an IP address automaticaly" it just doesnt work at all. I dont even recieve a ping reply.

I have now set it to manually obtain an IP address using the following

On the Host Computer:
IP Address...........:192.168.0.1
Subnet mask...........:225.225.225.0
Default Gateway...........:

On the Client Computer 1:
IP Address...........:192.168.0.69
Subnet Mask...........:225.225.225.0
Default Gateway...........:192.168.0.1

On the Client Computer 2:
IP Address...........:192.168.0.59
Subnet Mask...........:225.225.225.0
Default Gateway...........:192.168.0.1

And the Internet Connection Sharing still does not work!
What can this be? This is so frustrating i have tried almost everything, my hub is working fine, i can recieve ping replys when i manually obtain an IP address but it just doesnt work!

Any suggested would be much appreciated!

How are you trying to share the internet? Do you have a router, or ICS on one of your computers with a 2nd NIC?

I am using a hub, its kind of like this:

ADSL Modem ---> Downstairs PC ---> Hub (upstairs) ---> My PC and then to my brothers PC.

It used to work fine but the last week it just stopped.