internet connection sharing problems

I'm working with a client that had internet connection sharing wizard working, until this am. When I restarted the modem & router the internet connection was restored on the IC machine , but the 3 client computers that were getting access to the Internet not no longer were able to get the internet. I'm not sure what happened but would like to get it back. I tried to follow the MS instructions on setting up the IC sharing process again but am unable to get it to work. I followed the following instructions from MS.

How to use Internet Connection Sharing
To use Internet Connection Sharing to share your Internet connection, the host computer must have one network adapter that is configured to connect to the internal network, and one network adapter or modem that is configured to connect to the Internet.


On the host computer
On the host computer, follow these steps to share the Internet connection: 1. Log on to the host computer as Administrator or as Owner.
2. Click Start, and then click Control Panel.
3. Click Network and Internet Connections.
4. Click Network Connections.
5. Right-click the connection that you use to connect to the Internet. 6. Click Properties.
7. Click the Advanced tab.
8. Under Internet Connection Sharing, select the Allow other network users to connect through this computer's Internet connection check box.
10. Click OK. You receive the following message:
When Internet Connection Sharing is enabled, your LAN adapter will be set to use IP
address 192.168.0.1. ...... (BTW it did not automatically setup the 2nd adapter, I had to enter the ip info manually, which I'm not sure what I should put here because the IP Config for the nic with internet access has a 192.168.1.101 for an IP add and a gateway of 192.168.1.1 ..... I tried both 192.168.1.102 & 192.168.0.1 like it said in the instructions, neither way seemed to allow the client pc to access the internet)
Your computer may lose connectivity with other computers on
your network. If these other computers have static IP addresses, it is a good idea to set them
to obtain their IP addresses automatically. Are you sure you want to enable Internet
Connection Sharing?
11. Click Yes.
The connection to the Internet is shared to other computers on the local area network (LAN). The network adapter that is connected to the LAN is configured with a static IP address of 192.168.0.1 and a subnet mask of 255.255.255.0
On the client computer
To connect to the Internet by using the shared connection, you must confirm the LAN adapter IP configuration, and then configure the client computer. To confirm the LAN adapter IP configuration, follow these steps: 1. Log on to the client computer as Administrator or as Owner.
2. Click Start, and then click Control Panel.
3. Click Network and Internet Connections.
4. Click Network Connections.
5. Right-click Local Area Connection, and then click Properties.
6. Click the General tab, click Internet Protocol (TCP/IP) in the This connection uses the following items list, and then click Properties.
7. In the Internet Protocol (TCP/IP) Properties dialog box, click Obtain an IP address automatically (if it is not already selected), and then click OK.

Note You can also assign a unique static IP address in the range of 192.168.0.2 to 192.168.0.254. For example, you can assign the following static IP address, subnet mask, and default gateway:   IP Address      192.168.0.2
   Subnet mask     255.255.255.0
   Default gateway 192.168.0.1
(I did try both the static IP info & automatic configuration on the client pc's)            

8. In the Local Area Connection Properties dialog box, click OK.
9. Quit Control Panel.
To configure the client computer to use the shared Internet connection, follow these steps:
1. Click Start, and then click Control Panel.
2. Click Network and Internet Connections.
3. Click Internet Options.
4. In the Internet Properties dialog box, click the Connections tab.
5. Click the Setup button.

The New Connection Wizard starts.
6. On the Welcome to the New Connection Wizard page, click Next.
7. Click Connect to the Internet, and then click Next.
8. Click Set up my connection manually, and then click Next.
9. Click Connect using a broadband connection that is always on, and then click Next.
10. On the Completing the New Connection Wizard page, click Finish.
11. Quit Control Panel.
When you now start Microsoft Internet Explorer, the client computer will try to connect to the Internet by using the host computer's shared Internet connection.
(all the computers are in the same workgroup. I'm running Windows XP Pro also)