Hi Folks,

As most of people here with problems of sharing docs, browsing computer in network, etc (including myself), I followed all kind of suggestions here, I´d like to thanks for that, but I solved my problem with another solution.
I use Windows XP with SP2, but I don´t use the Windows Firewall (service is stopped) and (no comments about how it´s the worst firewall). I use Outpost Firewall, one of the best around.
If you don´t use Windows´s Firewall, maybe it could work for you too.
The only way, I could see my computers showing up again in my network place was:

I started Windows XP Firewall´s service again (services.msc).
Right click my Network place.
Click advanced in local connection.
Go to Firewall ´s option.
Uncheck all boxes.
Click ok in all and exit from my network place.
Stop Windows XP Firewall´s service (services.msc).
Disable it.
Double click in my network place and others computers should show up.

I hope it works for you.
My problem is solved.

Best Regards,

DonKid.