The place you posted is fine!
Please tell the program version you are using. I think we fixed an issue like this (but right here I do not recall exactly when and exact details about what the issue was). It you have free upgrades to 8.1 please try it .. or alternatively try the 8.1 TRIAL to back up those two tables (with the TRIAL you can only back up 2 tables per job).
Technically the server does not necessesarily 'die' (if you mean crash). Maybe it disconnects the client (SJA).
It may also be a server bug you encounter (and if the server crashes it *is* a server bug). So what is the server versions?