I've been using CHUNKvnc for several years now and maybe this tip will help someone else.
Install a free Logmein account on the repeater computer, install sysinternals tcpview and run. Plus, you might put a shortcut to the repeater log file. Now, after connecting if you think you will be working off and on for a while use the "install as service" on the remote computer. Sorry, I'm assuming some knowledge of CHUNKvnc in writing this.
If you loss a connection or cannot re-establish a connection. Log into the repeater computer, find the connection in tcpview, right-click and click disconnnect. In most cases the connection will appear again in the tcpview list and now try to connect again. 9 times out of 10 this works. Also, if you need the 6 digit access code you can see it in the repeat log files.
Any news of a new version of ChunkVNC??