Cannot Ping Host from Internal Interface

we have several Branches, in our company last week we just install Ava ya IPO500 in one of our branches after we configure it and install it we cannot reach to it From HQ even by ping  but still able to access other PC's

Our Configuration fro Router is

Taif#show config
Using 1500 out of 29688 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname Taif
!
boot-start-marker
boot-end-marker
!
!
no network-clock-participate slot 1
no network-clock-participate wic 0
no aaa new-model
ip subnet-zero
!
!
ip tftp source-interface FastEthernet0/0
ip dhcp excluded-address 192.168.18.200 192.168.18.254
ip dhcp excluded-address 192.168.18.1 192.168.18.25
!
ip dhcp pool taif-pool
   network 192.168.18.0 255.255.255.0
   default-router 192.168.18.20
   dns-server 192.168.1.10
   domain-name company.local
!
ip dhcp pool Avaya
   host 192.168.18.11 255.255.255.0
   client-identifier 0011.2018.ba20
   default-router 192.168.18.20
   dns-server 192.168.1.10
   domain-name company.local
!
ip cef
!
!
!
!
!
!
!
!
!
!
!
!
username xxxx privilege 15 password 7 xxxxxxxxxxx
!
!
!
!
!
!
interface FastEthernet0/0
 ip address 192.168.18.20 255.255.255.0
 speed auto
 full-duplex
 no mop enabled
!
interface FastEthernet0/1
 ip address 172.31.241.106 255.255.255.252
 duplex auto
 speed auto
!
router bgp 65099
 no synchronization
 bgp log-neighbor-changes
 redistribute connected
 neighbor 172.31.241.105 remote-as 65000
 no auto-summary
!
ip http server
no ip http secure-server
ip classless
ip route 0.0.0.0 0.0.0.0 172.31.241.105
ip route 192.168.7.0 255.255.255.0 192.168.1.20
!
!
!
!
snmp-server community xxxx RW
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
 login local
line vty 5 15
 login local
!
!
end

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my Ping test from Branch Router

Taif#ping 192.168.18.11 source 192.168.18.20

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.18.11, timeout is 2 seconds:
Packet sent with a source address of 192.168.18.20
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Taif#

Taif#ping 192.168.18.11 source 172.31.241.106

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.18.11, timeout is 2 seconds:
Packet sent with a source address of 172.31.241.106
.....
Success rate is 0 percent (0/5)

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My Trace route result from HQ

1    <1 ms    <1 ms    <1 ms  192.168.1.20
 2     1 ms     1 ms    <1 ms  192.168.1.23
 3    11 ms     8 ms    11 ms  84-235-64-149.static.saudi.net.sa [84.235.64.149]
 4    17 ms    16 ms    20 ms  172.31.241.106
 5     *        *        *     Request timed out.
 6     *        *        *     Request timed out.
 7     *        *        *     Request timed out.
 8     *        *        *     Request timed out.
 9     *        *        *     Request timed out.
10     *        *        *     Request timed out.
11     *        *        *     Request timed out.
12     *        *        *     Request timed out.
13     *        *        *     Request timed out.
14     *        *        *     Request timed out.
15     *        *        *     Request timed out.
16     *        *        *     Request timed out.
17     *        *        *     Request timed out.
18     *        *        *     Request timed out.
19     *        *        *     Request timed out.
20     *        *        *     Request timed out.
21     *        *        *     Request timed out.
22     *        *        *     Request timed out.
23     *        *        *     Request timed out.
24  ^C

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