Windows printing error 256

Hello everyone, this is my configuration:
MacBook Pro with OS X 10.4.10 and all the updates;
a desktop with Windows XP on it;
Canon MP810 as a printer and printfab as a driver.

I have got a Windows printer and I've had the "error: 256" when I try to access the printer or simply add it to the printers' list since a short time.
Probably I have had this since a security update.
http://www.apple-discuss.com/redirect.php?fid=6&tid=11292&goto=nextoldset
There you can read another discussion about this issue: no one could figure out how to fix this.
I have already tried using the advanced button clicking with option+spacebar on "more" and then manually setting the "smb://" URL.
I tried printing from another laptop where I have Windows and it perfectly worked.
I don't wanna spend cash for buying the wireless kit to print without the printer to be connected to a switched on computer.
Do you have any suggestion to fix the problem? I haven't called Apple yet, because very likely they won't be able to help me out with this problem. I called them in the past for easier issues and they couldn't help me. ^^

These are some tries that I did to debug the problem:

[i]Jupiter:~ deviad$ echo "hello" | smbclient //TimeMachine/CanonMP810 -c "print -"timeout connecting to 208.69.32.130:445 timeout connecting to 208.69.32.130:139 Error connecting to 208.69.32.130 (Operation already in progress) Connection to TimeMachine failed Jupiter:~ deviad$ echo "hello" | smbclient //192.168.1.2/CanonMP810 -c "print -"  Password: Anonymous login successful Domain=[WORKGROUP] OS=[Windows 5.1] Server=[Windows 2000 LAN Manager] tree connect failed: NT_STATUS_ACCESS_DENIED Jupiter:~ deviad$ echo "hello" | smbclient //192.168.1.2/CanonMP810 -c "print -"Password:  Anonymous login successful Domain=[WORKGROUP] OS=[Windows 5.1] Server=[Windows 2000 LAN Manager] tree connect failed: NT_STATUS_ACCESS_DENIED Jupiter:~ deviad$ echo "hello" | smbclient //pippo:xxx@192.168.1.2/CanonMP810 -c "print -" timeout connecting to 208.69.32.130:445 timeout connecting to 208.69.32.130:139 Error connecting to 208.69.32.130 (Operation already in progress) Connection to pippo:xxx@192.168.1.2 failed[/i]

What I do not understand now is who the heck is this 208.69.32.130. Why does my computer try to connect to this host? The IP of TimeMachine is 192.168.1.2
The IP of my macbook pro on the network is 192.168.1.3.
I really don't know what 208.69.32.130 is.
Thank you very much for your help.
Regards,
Davide