asa5505 to 3000 concentrator has intermittent connection

Cicso asa5505 8.2.5 cant keep a solid connection to Cisco VPN 3000 concentrator.
 
This is 5505 config:
# sh run
: Saved
:
ASA Version 8.2(5)
!
hostname kworobiec-asa
domain-name necam.com
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
!
interface Ethernet0/0
 switchport access vlan 2
 speed 100
 duplex full
!
interface Ethernet0/1
 speed 100
 duplex full
!
interface Ethernet0/2
 speed 100
 duplex full
!
interface Ethernet0/3
 speed 100
 duplex full  
!
interface Ethernet0/4
 speed 100
 duplex full
!
interface Ethernet0/5
 speed 100
 duplex full
!
interface Ethernet0/6
!
interface Ethernet0/7
!
interface Vlan1
 nameif inside
 security-level 100
 ip address 172.26.172.177 255.255.255.248
!
interface Vlan2
 nameif outside
 security-level 0
 ip address dhcp setroute
!
ftp mode passive
dns server-group DefaultDNS
 domain-name necam.com
pager lines 24
logging asdm informational
mtu inside 1500
mtu outside 1500
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
http server enable
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto isakmp policy 65535
 authentication pre-share
 encryption 3des
 hash sha
 group 2
 lifetime 86400
telnet timeout 5
ssh timeout 5
console timeout 0
management-access inside
dhcpd dns 172.24.20.70 172.24.172.35
dhcpd wins 172.24.21.48 172.24.172.35
dhcpd auto_config outside
!            
dhcpd address 172.26.172.178-172.26.172.182 inside
dhcpd enable inside
!
vpnclient server 143.101.4.25
vpnclient mode network-extension-mode
vpnclient vpngroup VPN-3002 password *****
vpnclient username kworobiec password *****
vpnclient management clear
vpnclient enable
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
!
class-map inspection_default
 match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
 parameters
  message-length maximum 512
policy-map global_policy
 class inspection_default
  inspect dns preset_dns_map
  inspect ftp
  inspect h323 h225
  inspect h323 ras
  inspect netbios
  inspect rsh
  inspect rtsp
  inspect skinny  
  inspect esmtp
  inspect sqlnet
  inspect sunrpc
  inspect tftp
  inspect sip  
  inspect xdmcp
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:4a31e9c5af456f01eb7c9db8b2128636
: end

I used a sample asa config, but it was 8.2.1, anyone think this is the problem?
The one with 8.2.1 apparently works.