Back in the days of iChat 3 there were issues with some Italian ISPs not allowing iChat to Video chat outside of the country.
I have not heard of this being a problem in Italy for a very long time.
(It is common in Dubai and other Middle Eastern Countries)
These are the ports that need to be open in your router and that the ISP should also have open
Are you sending from an Apple ID ?
This should not matter when sending wherever you are.
You may have issues if your iPad also uses a Cell/Mobile Service and the number is not "local" to where you are now.
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
iMac 2.5Ghz 5i 2011 (Mountain Lion 10.8.2)
G4/1GhzDual MDD (Leopard 10.5.8)
MacBookPro 2Gb (Snow Leopard 10.6.8)
Mac OS X (10.6.8),
Couple of iPhones and an iPad
"Limit the Logs to the Bits above Binary Images." No, Seriously