Internet con. sharing not working in 7 but yes in XP!

Hello everybody!
I have a Computer (Computer A) with two nics, one connected to an internet DSL modem and another connected to another computer (Computer B) (through a crossover cable). Computer A has XP and 7 and B only has XP.

In Windows XP, both computers share files and Computer B has internet. In Windows 7, both computers can see their files, but I cannot get Internet on Computer B.

In How to share internet connection in Windows 7 [Archive] - Virtual Dr Forums-Computer Tech Support I found the following:

1. I first connect to the wifi.
2. Then in control panel -> network connections, I right-click on my WiFi adapter (not the virtual wifi port) and then Properties, and then click on the sharing tab. I put a checkmark in "Allow other network users to connect through this computer's internet connection". Under Home Networking Connection drop-down, I chose "Local Area Connection" which is my laptop's LAN NIC.
3. I unchecked Allow other computers to control...
4. OK
5. Make sure the LAN NIC you will use for connecting to the other computer has any static IP configurations removed and set to DHCP.
6. Make sure the LAN NIC on the desktop you will connect to is set to DHCP also.
7. Connect a crossover cable from the laptop to the Desktop.
8. If it's windows vista or 7, then it should connect and present you with the "Home network, Public Network, Work Network." Choose appropriately.
You should now be connected! If the desktop doesn't automatically connect, you may want to "Diagnose" or "Repair" the LAN connection.

The issue I see is in step 2... Windows 7 automatically chooses the NIC for my internet connection, and i cannot choose the other NIC. In Windows XP, that edit box is not shown.
Check this pic:
http://imageupper.com/i/?S0400010100...30779351713319
"Speedy Nic" is the nic that connect to my modem. I should be able to select "red", the nic connecting to computer B.

Could you help me with this? anything I could do?
Thanks you very much for reading!

Solved it
I unchecked "Allow other network users to connect through this computer's internet connection", then closed the dialog, disconnected, checked that again and then the drop down with the two networks appear!
Odd sh*t.

You mean this one yup gotta check that one. It must have needed a reset.