1. Verify if vsftpd is really running or not:
Code:
ps -efl | grep -i vsftpd
2. From what you are saying, the service isn't running, so
Code:
/sbin/service vsftpd status
should give you "stopped" or something like that.
3. It seems also that there are still some locks left (ie vsftpd wasn't stopped correctly).
Try:
Code:
/sbin/service vsftpd stop
or "restart" instead of stop.
If that doesn't work, you'll need to manually remove the locks.