Telnet Access on Management interface

Trying to setup an ASA 5505 to sit behind a DSL netopia firewall/dsl modem.  I have the outside interface set to be configured by dhcp.  I have the inside set to give out dhcp on a different network.  This is going to sit at a remote office for the purpose of users that need to access 3rd party networks via VPN.  I have setup another interface for management and in a different vlan.  This is to be hooked into our internal network so I can access the 5505 for management only.  From a PC hooked to the inside interface, I can get to the internet etc.  I can connect to it using ASDM, HTTPS and Telnet.  On the mgmt interface I can use ASDM and https to get to it, but I can't telnet.  When I try and telnet, the log shows: syslog ID 402117 IPSEC: Received a non-IPSEC packet (protocol= TCP) from 10.1.24.120 to 10.1.20.5

Below is my config:

ASA Version 8.0(4)
!
hostname asa5505
domain-name domain.com
enable password xxxxx encrypted
passwd xxxx encrypted
names
!
interface Vlan1
 nameif inside
 security-level 100
 ip address 192.168.13.1 255.255.255.0
!
interface Vlan2
 nameif outside
 security-level 0
 ip address dhcp setroute
!
interface Vlan12
 no forward interface Vlan2
 nameif mgmt
 security-level 0
 ip address 10.1.20.5 255.255.255.0
 management-only
!
interface Ethernet0/0
 switchport access vlan 2
!
interface Ethernet0/1
 switchport access vlan 12
!
interface Ethernet0/2
!
interface Ethernet0/3
!
interface Ethernet0/4
!
interface Ethernet0/5
!
interface Ethernet0/6
!
interface Ethernet0/7
!
boot system disk0:/asa804-k8.bin
boot system disk0:/asa722-k8.bin
ftp mode passive
clock timezone EST -5
clock summer-time EDT recurring
dns server-group DefaultDNS
 domain-name domain.com
access-list outside_access_in extended permit icmp any any echo-reply
pager lines 24
logging enable
logging asdm informational
mtu inside 1500
mtu outside 1500
mtu mgmt 1500
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-613.bin
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
access-group outside_access_in in interface outside
route mgmt 10.0.0.0 255.0.0.0 10.1.1.1 1
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
dynamic-access-policy-record DfltAccessPolicy
http server enable
http 0.0.0.0 0.0.0.0 inside
http 0.0.0.0 0.0.0.0 mgmt
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
telnet 0.0.0.0 0.0.0.0 inside
telnet 0.0.0.0 0.0.0.0 mgmt
telnet timeout 5
ssh 0.0.0.0 0.0.0.0 mgmt
ssh timeout 5
console timeout 0
dhcpd auto_config outside
!
dhcpd address 192.168.13.25-192.168.13.50 inside
dhcpd auto_config outside interface inside
dhcpd enable inside
!

threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
ntp server 192.5.41.40 source outside prefer
username xxx password xxxx encrypted privilege 15
!
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 rsh
  inspect rtsp
  inspect esmtp
  inspect sqlnet
  inspect skinny  
  inspect sunrpc
  inspect xdmcp
  inspect sip  
  inspect netbios
  inspect tftp
!
service-policy global_policy global
prompt hostname context
Cryptochecksum:xxxxx
: end


Thanks for any helps and ideas.