Going through walls. I entered my registration codes and Kali still stops after 15 minutes. I entered the codes, but I still see a shareware screen. This stupid document didn't help. Before pressing alt-s make sure you get a message indicating that a PPP session has started or you get a series of strange characters.
Some systems require special prefixes and suffixes on usernames.
See the Chapter II section C-4 for more information. Either the packet driver didn't load properly from the load.bat file or you are running Kali already. You cannot run PING while Kali is loaded. A Either because the server you are trying to attach to is not running Kali or you don't have Kali configured properly. Anyway, this is almost always caused by an incorrect value in wattcp.cfg.