The most stable and resource friendly tracker software is XBT.
You can add the following to make XBT run on boot.
1. cd /etc/rc.d
2. vi rc.local
3. and add this line:
cd /root/xbt/Tracker
./xbt_tracker
4. that all you need, very easy but working fine.
note: you have to have httpd and mysqld running, and if you do this, your command will NOT respond to the usual service start/ stop commands.
Borrowed from here
As to why its stopping running, have you checked the log files?