Chat updsend over Internet

hi there,

i'm trying to work with upd.send/receive in the chat program and was testing with a friend. this is an example of the patch.

well It's not working. I'm using max 5.08, macbook intel 10.58. in my security->firewall perferences i've assign the maxmsp to recieve packets. it seems like there's a block somewhere. my buddy is on 10.6.3. could this be the problem?

any help on this?

dze