Please Help Me!!!

[Basilisk]

Ok, so i'm trying to play my friend in a modem to modem game. First time, eveything goes fine. But every time we've tried to get back into it the connection with each other somehow gets lost, we get this message "Oh No! Unable to send!" and one of us gets the option to drop the other from the game.
PLEASE HELP ME!! Does anyone know why this is happening? Any tips as to how to fix it?
Any help shall be much appreciated.

Ben

[Basilisk]

bump