ATM has SLOW performance

See config below- the throughput is very low- how do I troubleshoot / correct this? what can lead to slow performance?
I did SHUTDOWN ATM1/0 but that didn't seem to help.

version 12.2
service timestamps debug datetime localtime show-timezone
service timestamps log datetime localtime show-timezone
no service password-encryption
!
hostname BBOE_1010KingsHwy_2621
!
logging buffered 32000 debugging
enable secret 5 $1$UM52$Hj2GsTcMdMQZrI2dmtuSC/
!
clock timezone est -5
clock summer-time edt recurring
ip subnet-zero
!
!
no ip domain-lookup
!
ip cef
call rsvp-sync
!
 --More-- _________        _________!
!
!
!
!
!
!
interface FastEthernet0/0
 description connection to internal LAN
 ip address 172.16.3.254 255.255.255.0
 ip helper-address 172.16.1.1
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface ATM1/0
 description 1.5MB ATM T1 Circuit ID HCGJ.203412.NJ
 no ip address
 --More-- _________        _________ shutdown
 no atm ilmi-keepalive
 no scrambling-payload
!
interface ATM1/0.134 point-to-point
 description 1.5MB ATM PVC to 1010 Kings Hwy rem CID HCGJ.203412.NJ
 ip address 172.16.51.2 255.255.255.252
 ip load-sharing per-packet
 pvc 1/34
  protocol ip 172.16.51.1 broadcast
  vbr-nrt 1500 750 100
  encapsulation aal5snap
 !
!
interface ATM1/1
 description 1.5MB ATM T1 Circuit ID HCGJ.212319.NJ
 no ip address
 no atm ilmi-keepalive
 no scrambling-payload
!
interface ATM1/1.1 point-to-point
 description 1.5MB ATM PVC to 1010 Kings Hwy rem CID HCGJ.203412.NJ (2)
 ip address 172.16.51.6 255.255.255.252
 --More-- _________        _________ pvc 1/41
  protocol ip 172.16.51.5
  vbr-nrt 1500 750 100
  encapsulation aal5snap
 !
!
interface ATM1/2
 no ip address
 shutdown
 no atm ilmi-keepalive
 no scrambling-payload
!
interface ATM1/3
 no ip address
 shutdown
 no atm ilmi-keepalive
 no scrambling-payload
!
router eigrp 100
 variance 5
 network 172.16.0.0
 no auto-summary
 no eigrp log-neighbor-changes
 --More-- _________        _________!
ip classless
ip http server
!
!
!
dial-peer cor custom
!
!
!
!
gatekeeper
 shutdown
!
banner exec ^C
**************************************************************************
WARNING:       
This system is for the use of authorized clients only. Individuals using the
computer network system without authorization, or in excess of their
authorization, are subject to having all their activity on this computer
network system monitored and recorded by system personnel. To protect the
computer network system from unauthorized use and to ensure the computer network
systems is functioning properly, a system administrator may monitor this system.
 --More-- _________        _________Anyone using this computer network system expressly consents to such monitoring
and is advised that if such monitoring reveals possible conduct of criminal
activity, system personnel may provide the evidence of such activity to law
enforcement officers.
Access is restricted to authorized users only. Unauthorized access is a
violation of state and federal, civil and criminal laws.
**************************************************************************
^C
!
line con 0
 exec-timeout 15 0
 password cisco
 login
line aux 0
 exec-timeout 15 0
 password cisco
 login
line vty 0 4
 exec-timeout 15 0
 password cisco
 login
line vty 5 15
 login
 --More-- _________        _________!
no scheduler allocate
end