problem in my Access server cisco 2511 :(

BGP

Hi Guys,
I am using a terminal server Cisco 2511 to access my 3 2500 series router and everything is working fine
I can jump from the access server to any router but when I want to jump back from the router to the access server I have to type control **** 6 x many time to make it work and I can get back but this is horrible L even when I make key map in my securecrt it is working good and I can get back but I have to press the key map around ten times .

I believe there is problem ether in my configuration or in my hardware I well post my configuration
Please help me I get disability in my fingers L

My configuration :
Building configuration...

Current configuration : 656 bytes
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname ACCESS_Server
!
!
!
!
!
!
ip subnet-zero
no ip domain-lookup

ip host R3 2003 100.1.1.1
ip host R1 2001 100.1.1.1
ip host R2 2002 100.1.1.1
!
!
!
!
interface Loopback0
ip address 100.1.1.1 255.255.255.255
no ip directed-broadcast
!
interface Ethernet0
no ip address
no ip directed-broadcast
shutdown
!
interface Serial0
no ip address
no ip directed-broadcast
no ip mroute-cache
shutdown
no fair-queue
!
interface Serial1
no ip address
no ip directed-broadcast
shutdown
!
ip classless
no ip http server
!
!
line con 0
exec-timeout 0 0
logging synchronous
transport input none
line 1 8
no exec
transport input all
line aux 0
line vty 0 4
login
!
end

BGP

any suggestion