Printing through XP Firewall

> Hi
>
> I have 4 computers running XP PRo in my house. We are all connected to a
> switch, the switch is connected to a Lynksys Router for internet. I have
> the XP firewall running on each system. I have followed the directions
> from here http://www.microsoft.com/security/protect/ports.asp, for
> allowing print sharing through a firewall and when I put the port in the
> first time anyone can print to my printer, but the cannot print any more.
> Under the port setup in the Firewall box, It ask for the computer IP for
> this port and per the instructions I put in the 127.0.0.1. I click ok and
> still no one can print. When I go back to edit the port the 127.0.0.1 is
> changed to my computer name. I am thinking this why no one can print.
>
> Is there a way to keep the number instead of the name, or am I messing up
> something else. When I take off the firewall everyone can print to my
> printer with no problems so I know it has to do with the firewall.
>
> I have the following ports open for TCP
> 139
> 445
>
> For UDC I have
> 136
> 137
> 139
> 445
>
> Still it will only work once I turn the ports on and then that is it, have
> to remove firewall and then put it back in order to print
>
> Any help or suggestions.