In need of help setting up network (ICS)

I'm trying to share the net connection with my xbox. The modem connects to the PC via USB. Then the xbox is hooked on to the NIC. I already have it set up so I can FTP back and forth. The problem is when the xbox is turned on I can't access the internet on the PC. I went to (Network connections) and seen this:

Internet Gateway:
L.A.C. on Linix IGD (this connection disables and reconnects when you power off the xbox)

LAN or High Speed:
L.A.C (this is the xbox connection)

&

L.A.C #4 Actiontec Gateway #2 (this is the modem connection)

When I try to go into the Actiontec and check the box for ICS I get an message saying it will us IP 192.168.0.1 then anerror message saying:

ICS can not be enabled. A LAN connection is already configured with the IP address that is required for automatic IP adressing.

The xbox LAN is set to 192.168.2.1 I tried setting it to (obtain automatically) but got the same error message.

I'm lost now I would like to get this working instead of buying a router. I have dsl with sprint if that helps any.

Hmm, type ipconfig in a command prompt on the PC and tell us what it says.

Perhaps the cable modem is doing NAT and is using 192.168.0.x

ok...
Ethernet adapter local area connection:

Connection-specific DNS suffix:
IP address..................192.168.2.1
subnet mask................255.255.255.0
default gateway...........192.168.2.1

Ethernet adapter local area connection 4:

Connection-specific DNS suffix :domain.actdsltmp
IP address..................192.168.0.2
Subnet mask..............255.255.255.0
Default gateway..........192.168.0.1

It sound likes the first network adaptor is the ethernet card that connects to the xbox and connection 4 is the USB connection to the cablemodem.

ICS is typical microsoft bugware. The ICS machine has to be 192.168.0.1 on the ethernet segment that the client computers are on.
The ethernet card used to talk to the xbox will have to be 192.168.0.1 and you will have to reconfigure the cable modem to either not do NAT(consider the secuirty issues of give your computer an internet reachable ip) or to use a different subnet.

how do set the modem not to NAT or can I use any sub net number?

>how do set the modem not to NAT

Read the documentation. If you don't have documentation then put the manfuacture and model number into google and look at the manufacturers website. If the ISP supplied the modem you can try calling them for help.

Typically the modem will have a web interface. The PC's default gateway address will be the modems ip address, in this case 192.168.0.1 so
try http://192.168.0.1 in your browser. They sometimes use a fixed address like http://192.168.100.1

If you have your browser set to use a proxy you may have to temporarily disable it.

>can I use any sub net number?
If you turn off NAT you should get an ip from the ISP.

If you want to use a different subnet witht he mdoem doing NAT you should use a block of ip addresses which are reserved for lan use such
as making the modem 10.0.0.1 netmask 255.255.255.0 and set it to
give out addresses with dhcp in the range 10.0.0.2 to 10.0.0.253