No in.ftpd processes

I'm kinda new to solaris 10 and there's something I'm curious about. We use solaris 10 on one of our FTP servers. There are numerous active connections to our FTP daemon (WU-FTPD), but I don't see any in.ftpd processes using 'ps -ef'. However, I do see processes listed in prstat and connections in netstat. Why do in.ftpd processes no longer appear in 'ps'?

[373 byte] By [tjleong] at [2007-11-26 11:16:42]