TV's Frink said:

That's just because you don't speak their language.

My point exactly. :p

Hey wait a minute. You could make a message with Chewie and Artoo, provided you have Threepio translating their sentences and/or talking back to them. That would work wouldn't it? I mean that's Goldenrod's job after all...

Edit:

Re: Lando

"Hi, I'm Lando Calrissian, and I'll be your best friend and I'll never betray you. Promise. What? No I'm not crossing my fingers. It's.. er... arthritis. You know, the disadvantages to live in Cloud City. Now pardon me as I'm off to meet some nice guy who loves capes just as much as me."