problemas ao iniciar ntop

Pessoal, por favor me ajudem... ao executar o comando ntop -untop apresenta a seguinte msg

Mon Nov 17 08:34:26 2008 NOTE: Interface merge enabled by default
Mon Nov 17 08:34:26 2008 Initializing gdbm databases
Mon Nov 17 08:34:26 2008 ntop v.3.2 SourceForge .tgz
Mon Nov 17 08:34:26 2008 Configured on Dec 26 2006 10:53:49, built on Dec 26 20
06 10:54:23.
Mon Nov 17 08:34:26 2008 Copyright 1998-2005 by Luca Deri <[email protected]>
Mon Nov 17 08:34:26 2008 Get the freshest ntop from Welcome to ntop.org
Mon Nov 17 08:34:26 2008 NOTE: ntop is running from 'ntop'
Mon Nov 17 08:34:26 2008 NOTE: (but see warning on man page for the --instance
parameter)
Mon Nov 17 08:34:26 2008 NOTE: ntop libraries are in '/usr/lib'
Mon Nov 17 08:34:26 2008 Initializing ntop
Mon Nov 17 08:34:27 2008 **WARNING** Truncated network size (device eth0) to 10
24 hosts (real netmask 255.255.0.0)
Mon Nov 17 08:34:27 2008 Checking eth0 for additional devices
Mon Nov 17 08:34:27 2008 Resetting traffic statistics for device eth0
Mon Nov 17 08:34:27 2008 DLT: Device 0 [eth0] is 1, mtu 1514, header 14
Mon Nov 17 08:34:27 2008 Initializing gdbm databases
Mon Nov 17 08:34:27 2008 VENDOR: Loading MAC address table.
Mon Nov 17 08:34:27 2008 VENDOR: Checking for MAC address table file
Mon Nov 17 08:34:27 2008 VENDOR: File '/etc/ntop/specialMAC.txt' does not need
to be reloaded
Mon Nov 17 08:34:27 2008 VENDOR: ntop continues ok
Mon Nov 17 08:34:27 2008 VENDOR: Checking for MAC address table file
Mon Nov 17 08:34:27 2008 VENDOR: File '/etc/ntop/oui.txt' does not need to be r
eloaded
Mon Nov 17 08:34:27 2008 VENDOR: ntop continues ok
Mon Nov 17 08:34:27 2008 Fingeprint: Loading signature file.
Mon Nov 17 08:34:27 2008 Fingeprint: ...loaded 1697 records
Mon Nov 17 08:34:27 2008 ASN: Checking for Autonomous System Number table file
Mon Nov 17 08:34:27 2008 ASN: Loading file '/etc/ntop/AS-list.txt'
Mon Nov 17 08:34:27 2008 ASN: ...found 111435 lines
Mon Nov 17 08:34:27 2008 ASN: ....Used 3780 KB of memory (12 per entry)
Mon 17 Nov 2008 08:34:27 AM BRST I18N: Default language (from ntop host) is 'en
_US'
Mon 17 Nov 2008 08:34:27 AM BRST I18N: This instance of ntop supports 0 additio
nal language(s)
Mon 17 Nov 2008 08:34:27 AM BRST IP2CC: Checking for IP address <-> Country Cod
e mapping file
Mon 17 Nov 2008 08:34:27 AM BRST IP2CC: Loading file '/etc/ntop/p2c.opt.table'
Mon 17 Nov 2008 08:34:27 AM BRST IP2CC: ...found 52395 lines
Mon 17 Nov 2008 08:34:27 AM BRST GDVERCHK: Guessing at libgd version
Mon 17 Nov 2008 08:34:27 AM BRST **WARNING** GDVERCHK: Unable to load gd, messa
ge is 'libgd.so: cannot open shared object file: No such file or directory'
Mon 17 Nov 2008 08:34:27 AM BRST GDVERCHK: ... as 2.x
Mon 17 Nov 2008 08:34:27 AM BRST Initializing external applications
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t3021675440]: NPA: Started thread f
or network packet analyzer
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t3013282736]: SFP: Started thread f
or fingerprinting
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t3004890032]: SIH: Started thread f
or idle hosts detection
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t2996497328]: DNSAR(1): Started thr
ead for DNS address resolution
Mon 17 Nov 2008 08:34:27 AM BRST Calling plugin start functions (if any)
Mon 17 Nov 2008 08:34:27 AM BRST SSL is present but https is disabled: use -W <
https port> for enabling it
Mon 17 Nov 2008 08:34:27 AM BRST INITWEB: Initializing web server
Mon 17 Nov 2008 08:34:27 AM BRST INITWEB: Initializing tcp/ip socket connection
s for web server
Mon 17 Nov 2008 08:34:27 AM BRST **ERROR** INITWEB: binding problem - 'Address
already in use'(98)
Mon 17 Nov 2008 08:34:27 AM BRST Check if another instance of ntop is running
Mon 17 Nov 2008 08:34:27 AM BRST or if the current user (-u) can bind to the sp
ecified port
Mon 17 Nov 2008 08:34:27 AM BRST **FATAL_ERROR** Binding problem, ntop shutting
down...
Mon 17 Nov 2008 08:34:27 AM BRST CLEANUP[t3056978496]: ntop caught signal 2
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t3056978496]: ntop RUNSTATE: SHUTDO
WN(7)
Mon 17 Nov 2008 08:34:27 AM BRST CLEANUP[t3056978496] catching thread is MAIN
Mon 17 Nov 2008 08:34:27 AM BRST CLEANUP: Running threads NPA SFP SIH DNSAR1
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t3021675440]: NPA: network packet a
nalyzer (packet processor) thread running [p23120]
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t3021675440]: NPA: network packet a
nalyzer (packet processor) thread terminated [p23120]
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t3013282736]: SFP: Fingerprint scan
thread starting [p23120]
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t3013282736]: SFP: Fingerprint scan
thread running [p23120]
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t3004890032]: SIH: Idle host scan t
hread starting [p23120]
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t3004890032]: SIH: Idle host scan t
hread running [p23120]
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t2996497328]: DNSAR(1): Address res
olution thread running [p23120]
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t2996497328]: DNSAR(1): Address res
olution thread terminated [p23120]
Mon 17 Nov 2008 08:34:27 AM BRST CLEANUP: Locking purge mutex (may block for a
little while)
Mon 17 Nov 2008 08:34:27 AM BRST CLEANUP: Locked purge mutex, continuing shutdo
wn
Mon 17 Nov 2008 08:34:27 AM BRST CLEANUP: Continues (still running SFP SIH)
Mon 17 Nov 2008 08:34:27 AM BRST FREE_HOST: Start, 1 device(s)
Mon 17 Nov 2008 08:34:27 AM BRST FREE_HOST: End, freed 0
Mon 17 Nov 2008 08:34:27 AM BRST PLUGIN_TERM: Unloading plugins (if any)
Mon 17 Nov 2008 08:34:27 AM BRST CLEANUP: Freeing device eth0 (idx=0)
Mon 17 Nov 2008 08:34:27 AM BRST CLEANUP: Clean up complete
Mon 17 Nov 2008 08:34:27 AM BRST THREADMGMT[t3056978496]: ntop RUNSTATE: TERM(8
)
Mon 17 Nov 2008 08:34:27 AM BRST CLEANUP[t3056978496]: Still running threads SF
P SIH
Mon 17 Nov 2008 08:34:27 AM BRST ===================================
Mon 17 Nov 2008 08:34:27 AM BRST ntop is shutdown...
Mon 17 Nov 2008 08:34:27 AM BRST ===================================