Check that it is started after the network is up. Of course, you should check the log files if it tells you something about why it does not continue.

Add this to /etc/init.d/aiccu right after the #! /bin/sh line. ### BEGIN INIT INFO # Provides: aiccu # Required-Start: $local_fs $remote_fs $syslog $network $time $named # Required-Stop: $local_fs $remote_fs $syslog $network $time $named # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: SixXS Automatic IPv6 Connectivity Client Utility # Description: # This client configures IPv6 connectivity without having to # manually configure interfaces etc. A SixXS account or an account # of another supported tunnel broker and at least one tunnel are # required. These can be freely requested from the SixXS website # at no cost. For more information about SixXS check their homepage. ### END INIT INFO