Vista - Remote Desktop puzzle that is beyond me...

Hi,

I have 2 computers that both run Vista and I have used the laptop in the past to access the desktop via RDC. This past weekend, from one outside location, I tried to connect as in the past but couldn't. The message from Vista said it couldn't connect.

I checked all my firewall settings (including turning off the firewall within Trend Micro, and using Windows Firewall that is set to allow RDC).

Here's the wierd part. I can connect sucessfully from one wireless network (not mine, a neighbors) every time, but when I try to connect from another wireless network (a different neighbor) I cannot connect. I can repeat this every time.

Nothing has changed on my laptop or my desktop. I connect sucessfully from one external wireless but not from the other. How can this be?

Please tell me what I'm missing...

Thanks for any input,
bob