T1 bonding, cisco 2811 and Earthlink

[geekphreek]

Hi All

I've installed 2 x T1 with a Cisco 2811 and with a config supplied by Earthlink to enable bonding. This is my config but it's giving really poor performance:

---------------------------------
service timestamps debug uptime
service timestamps log uptime
hostname ded00395329/ded00395324/ded00395327/ded00395326
!
memory-size iomem 15
ip subnet-zero
!
controller T1 0/0
framing esf
linecode b8zs
channel-group 0 timeslots 1-24 speed 64
clock source line
!
controller T1 0/1
framing esf
linecode b8zs
channel-group 0 timeslots 1-24 speed 64
clock source line
!
interface MFR1
mtu 4470
no ip address
no ip redirects
no ip proxy-arp
encapsulation frame-relay IETF
no ip route-cache cef
no ip mroute-cache
load-interval 30
no arp frame-relay
frame-relay lmi-type ansi
frame-relay intf-type dte
frame-relay multilink bid u230134
no shutdown
!
interface MFR1.500 point-to-point
ip unnumbered FastEthernet0/0
no ip redirects
no ip proxy-arp
no arp frame-relay
no cdp enable
frame-relay interface-dlci 500 IETF
no shutdown
!
interface FastEthernet0/0
ip address 63.118.221.1 255.255.255.192 duplex auto speed auto no
cdp enable no shutdown !
interface Serial0/0:0
mtu 4470
bandwidth 1536
no ip address
no ip redirects
no ip proxy-arp
encapsulation frame-relay MFR1
no arp frame-relay
no shutdown
!
interface Serial0/1:0
mtu 4470
bandwidth 1536
no ip address
no ip redirects
no ip proxy-arp
encapsulation frame-relay MFR1
no arp frame-relay
no shutdown
!
ip classless
ip route 0.0.0.0 0.0.0.0 MFR1.500
no ip http server
ip pim bidir-enable
!
no cdp run
!
!
!
!
end
---------------------------------

Any tips or changes I can make? I have a VPN running over this and sometimes I don't pull any more than 0.5Mbps rather than the 2Mbps which I should get (limited by the UK leased line).

Thanks