Configure conference bridge in VG

Hi all,
I am configuring a conference bridge but i am not able to configure "maximum sessions 2 "
In my dspfarm profile also i do a no shut it asks me configure session but its not possible.
check config below
I am not able to configure maximum sessions 1 or 2 , 3 nothing
SiteC-RTR#sh run
Building configuration...
Current configuration : 6269 bytes
! Last configuration change at 20:04:27 GMT Mon Nov 18 2013
! NVRAM config last updated at 20:15:12 GMT Mon Nov 18 2013
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
hostname SiteC-RTR
boot-start-marker
boot-end-marker
logging message-counter syslog
no aaa new-model
memory-size iomem 20
clock timezone GMT 0
network-clock-participate wic 2
dot11 syslog
ip source-route
ip dhcp excluded-address 10.10.202.1 10.10.202.119
ip dhcp excluded-address 10.10.202.130 10.10.202.254
ip dhcp pool SC
   network 10.10.202.0 255.255.255.0
   default-router 10.10.202.1
   option 150 ip 10.10.210.11 10.10.210.10
ip cef
no ipv6 cef
multilink bundle-name authenticated
isdn switch-type primary-net5
voice class codec 1
codec preference 1 g711ulaw
codec preference 2 g729r8
voice class h323 1
h225 timeout tcp establish 3
voice translation-rule 1
rule 1 /.+$....$$/ /\1/
voice translation-rule 4000
rule 1 /^4...$/ /+44207796\0/
voice translation-profile 4000
translate calling 4000
voice translation-profile 8digitANI
translate calling 4000
voice translation-profile strip
translate called 1
voice-card 0
dsp services dspfarm
archive
log config
hidekeys
controller E1 0/2/0
pri-group timeslots 1-4,16
interface Loopback0
ip address 10.10.110.3 255.255.255.255
ip ospf network point-to-point
h323-gateway voip bind srcaddr 10.10.110.3
interface Loopback1
ip address 10.10.115.1 255.255.255.0
ip ospf network point-to-point
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
interface Service-Engine0/0
ip unnumbered Loopback1
service-module ip address 10.10.115.2 255.255.255.0
service-module ip default-gateway 10.10.115.1
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
interface FastEthernet0/1/0
switchport trunk native vlan 301
switchport mode trunk
switchport voice vlan 302
interface FastEthernet0/1/1
switchport trunk native vlan 301
switchport mode trunk
switchport voice vlan 302
interface FastEthernet0/1/2
switchport access vlan 301
switchport mode trunk
switchport voice vlan 302
interface FastEthernet0/1/3
switchport access vlan 301
switchport mode trunk
switchport voice vlan 302
interface Serial0/2/0:15
no ip address
encapsulation hdlc
isdn switch-type primary-net5
isdn incoming-voice voice
isdn outgoing display-ie
no cdp enable
interface Serial0/3/0
ip address 10.10.114.2 255.255.255.0
encapsulation frame-relay IETF
ip ospf mtu-ignore
shutdown
fair-queue 64 256 2
frame-relay interface-dlci 102
ip rsvp bandwidth 64
interface Serial0/3/1
ip address 10.10.112.2 255.255.255.0
encapsulation ppp
ip ospf mtu-ignore
clock rate 2000000
interface Vlan1
no ip address
interface Vlan302
ip address 10.10.202.1 255.255.255.0
router ospf 1
log-adjacency-changes
network 0.0.0.0 255.255.255.255 area 0
ip forward-protocol nd
ip route 10.10.115.2 255.255.255.255 Service-Engine0/0
ip http server
ip http authentication local
no ip http secure-server
ip http path flash:GUI/admin_user.html
disable-eadi
control-plane
voice-port 0/2/0:15
translation-profile incoming strip
ccm-manager fax protocol cisco
sccp local Vlan302
sccp ccm 10.10.210.11 identifier 1 version 7.0
sccp ccm 10.10.210.10 identifier 2 version 7.0
sccp ccm group 1
bind interface Vlan302
associate ccm 1 priority 1
associate ccm 2 priority 2
associate profile 3 register sc-cfb
associate profile 2 register sc-mtp
associate profile 1 register sc-xcoder
dspfarm profile 2 transcode
codec g711ulaw
codec g711alaw
codec g729ar8
codec g729abr8
maximum sessions 4
associate application SCCP
dspfarm profile 3 conference
codec g711ulaw
codec g711alaw
codec g729ar8
codec g729abr8
codec g729r8
codec g729br8
associate application SCCP
shutdown
dspfarm profile 1 mtp
codec g729r8
codec pass-through
rsvp
maximum sessions software 100
associate application SCCP
dial-peer voice 1 pots
incoming called-number .
direct-inward-dial
dial-peer voice 2 voip
destination-pattern 4...
voice-class codec 1
voice-class h323 1
session target ipv4:10.10.210.11
incoming called-number .
dtmf-relay h245-alphanumeric
no vad
dial-peer voice 3 voip
preference 1
destination-pattern 4...
voice-class codec 1
voice-class h323 1
session target ipv4:10.10.210.10
dtmf-relay h245-alphanumeric
no vad
dial-peer voice 999 pots
translation-profile outgoing 8digitANI
destination-pattern 999
port 0/2/0:15
forward-digits 3
dial-peer voice 8 pots
translation-profile outgoing 4000
destination-pattern 9[1-9].......
port 0/2/0:15
forward-digits 8
dial-peer voice 11 pots
translation-profile outgoing 4000
destination-pattern 90[1-9].........
port 0/2/0:15
forward-digits 11
dial-peer voice 900 pots
translation-profile outgoing 4000
destination-pattern 900T
port 0/2/0:15
prefix 00
num-exp 2...$ 90012025552...
num-exp 3...$ 90014083873...
gatekeeper
shutdown
telephony-service
srst mode auto-provision all
srst dn line-mode octo
max-ephones 4
max-dn 4
ip source-address 10.10.202.1 port 2000
time-zone 21
time-format 24
max-conferences 4 gain -6
web admin system name admin password cisco
dn-webedit
time-webedit
transfer-system full-consult
create cnf-files version-stamp 7960 Nov 18 2013 19:20:30
ephone-dn 1
number 4002
description +442077964002
name +442077964002
ephone-dn 2
number 4000
description +442077964000
name +442077964000
ephone-dn 3
number 4001
description +442077964001
name +442077964001
ephone 1
device-security-mode none
mac-address 0017.95B0.D7CE
button 1:1 2:2
ephone 2
device-security-mode none
mac-address 0018.187C.1844
button 1:3 2:2
line con 0
exec-timeout 0 0
password 7 1511021F0725
login
line aux 0
line 66
no activation-character
no exec
transport preferred none
transport input all
transport output lat pad telnet rlogin lapb-ta mop udptn v120 ssh
line vty 0 4
exec-timeout 0 0
password 7 121A0C041104
login
scheduler allocate 20000 1000
ntp server 10.10.110.1
end

Hi Jaime,
Thanks for your reply.. to be honest this is first time that i'm configuring this its lab purposes.
I've checked my voicegatewat vesion:
Cisco 2801 (revision 6.0) with 314368K/78848K bytes of memory.
Processor board ID FTX1036W2D0
6 FastEthernet interfaces
5 Serial interfaces
2 Serial(sync/async) interfaces
1 terminal line
1 Channelized/Clear E1/PRI port
1 Virtual Private Network (VPN) Module
1 DSP, 16 Voice resources
1 cisco service engine(s)
DRAM configuration is 64 bits wide with parity disabled.
191K bytes of NVRAM.
62720K bytes of ATA CompactFlash (Read/Write)
Configuration register is 0x2102
Will this answer your question in combination with the config i'v attached earlier?
@ gergely=====>
This is output of sh voice dsp voice
SiteC-RTR#sh voice dsp voice
edsp 0001 01 g729r8 p 0.1 IDLE 50/0/1.1
edsp 0002 01 g729r8 p 0.1 IDLE 50/0/2.1
edsp 0003 01 g729r8 p 0.1 IDLE 50/0/3.1
----------------------------FLEX VOICE CARD 0 ------------------------------
                           *DSP VOICE CHANNELS*
CURR STATE : (busy)inuse (b-out)busy out (bpend)busyout pending
LEGEND     : (bad)bad    (shut)shutdown (dpend)download pending
DSP   DSP                 DSPWARE CURR BOOT                         PAK   TX/RX
TYPE NUM CH CODEC        VERSION STATE STATE   RST AI VOICEPORT TS ABRT PACK COUNT
===== === == ========= ========== ===== ======= === == ========= == ==== ============
C5510 001 01 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 02 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 03 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 04 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 05 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 06 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 07 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 08 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 09 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 10 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 11 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 12 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 13 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 14 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 15 None          23.8.6 idle idle      0 0                 0          0/0
C5510 001 16 None          23.8.6 idle idle      0 0                 0          0/0
------------------------END OF FLEX VOICE CARD 0 ----------------------------

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