Nat reversible - lost connection from inside

From the 1821 router i lost random the connection from inside machine 192.168.0.31 to the vpn site ( i recive host unreachable from router 192.168.0.1) and to internet, but from other machines no issues. From the vpn site i can ping and reach 192.168.0.31.
any idea??

crypto isakmp policy 10
 authentication pre-share
 group 2
crypto isakmp key kkkkkk address xxxxx no-xauth
!
crypto ipsec security-association lifetime seconds 86400
!
crypto ipsec transform-set TS-01 esp-des esp-sha-hmac
!
crypto map CM-FE1 10 ipsec-isakmp
 description VPN Van to x
 set peer xxxxxx
 set transform-set TS-01
 set pfs group2
 match address 100
!
!
!
!
interface FastEthernet0
 description UNIT NETWORK (192.168.0.0)
 ip address 192.168.0.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly
 load-interval 60
 duplex auto
 speed auto
 no cdp enable
 hold-queue 4096 in
 hold-queue 4096 out
!
interface FastEthernet1
 description ADSL line - VPN to x
 backup delay 10 10
 backup interface BRI0
 ip address dhcp
 ip access-group FE1-IN in
 ip access-group FE1-OUT out
 no ip redirects
 ip nat outside
 ip virtual-reassembly
 load-interval 60
 duplex auto
 speed auto
 no cdp enable
 crypto map CM-FE1
 hold-queue 4096 in
 hold-queue 4096 out
!
interface BRI0
 bandwidth 64
 ip address 172.31.225.1 255.255.255.0
 no ip redirects
 ip nat outside
 ip virtual-reassembly
 encapsulation ppp
 no ip mroute-cache
 load-interval 60
 dialer idle-timeout 90
 dialer fast-idle 1
 dialer enable-timeout 1
 dialer string xxxxx
 dialer hold-queue 100
 dialer load-threshold 192 either
 dialer-group 1
 isdn switch-type basic-net3
 isdn point-to-point-setup
 ppp authentication chap
 ppp multilink
 hold-queue 512 in
 hold-queue 512 out

!
interface Vlan1
 no ip address
!
ip route 0.0.0.0 0.0.0.0 BRI0 10
ip route 0.0.0.0 0.0.0.0 dhcp
!
!
no ip http server
no ip http secure-server
ip nat pool IP-POOL-VPN 172.31.225.1 172.31.225.254 prefix-length 24 type match-host
ip nat inside source route-map RM-NAT-INTERNET interface FastEthernet1 overload
ip nat inside source route-map RM-NAT-VPN pool IP-POOL-VPN reversible
!
ip access-list extended FE1-IN
 evaluate FE1-OUT-REFLEX
 permit udp host xxxx eq isakmp any eq isakmp
 permit udp host xxxxx eq non500-isakmp any eq non500-isakmp
 permit esp host xxxx any
 permit udp any eq bootps host 255.255.255.255 eq bootpc
 remark Permit traffic coming from x
 permit ip 172.31.0.0 0.0.255.255 172.31.225.0 0.0.0.255
 permit ip 10.16.127.0 0.0.0.127 172.31.225.0 0.0.0.255
 deny   ip any any log
ip access-list extended FE1-OUT
 permit ip any any reflect FE1-OUT-REFLEX
 deny   ip any any log
!
no logging trap
access-list 100 remark Encrypts traffic with destination x
access-list 100 permit ip 172.31.225.0 0.0.0.255 172.31.0.0 0.0.255.255
access-list 100 permit ip 172.31.225.0 0.0.0.255 10.16.127.0 0.0.0.127
access-list 100 deny   ip any any
access-list 101 permit icmp any any
access-list 101 deny   ip any any
access-list 111 remark Traffic that can go in internet
access-list 111 deny   ip any 10.0.0.0 0.255.255.255
access-list 111 deny   ip any 172.16.0.0 0.15.255.255
access-list 111 deny   ip any 192.168.0.0 0.0.255.255
access-list 111 permit ip 192.168.0.0 0.0.0.255 any
access-list 111 deny   ip any any
access-list 121 remark traffic To be natted for Vpn
access-list 121 permit ip 192.168.0.0 0.0.0.255 172.31.0.0 0.0.255.255
access-list 121 permit ip 192.168.0.0 0.0.0.255 10.16.127.0 0.0.0.127
access-list 121 deny   ip any any
dialer-list 1 protocol ip list 101
no cdp run
route-map RM-NAT-VPN permit 1
 match ip address 121
!
route-map RM-NAT-INTERNET permit 10
 match ip address 111