Alain,

I assume you use a Fixed IP address.

1)
What IP address are you using in your iPronto?
(Press and hold the scroll wheel for 5 seconds.
The page turns to its flipside > then press Network tab > look at IP address).

2)
What IP address do you type in the field "Target iPronto" (popup window: Looking for iProntos)?
This address must be the same as the IP address in your iPronto to perform a succesfull connection.

Kees