Pigro: thank you very much for your answer, you asked the right question: I wasn't able to connect from other PC.

The problem was that I was trying to connect via RDP to Windows 7 Home Premium and it is supported only by Professional, Business, and Ultimate versions.

Anyway, RDP is cool, it can use the native resolution of the client screen, in this case 800x480, so I don't need to scroll the screen. I was using VNC before, and I didn't find this solution before, so for googlers: (sorry for the offtopic)

- How can I use 800x480 on N900 through VNC or change windows resolution to 800x480 using virtual video drivers?
- There are virtual drivers but are only available for WinXP. I recommend using RDP (Remote Desktop Connection) (rdesktop on N900 in maemos-devel repository) it will log-on in 800x480 to Windows. Also, RDP is faster than VNC.