PIX Checkpoint VPN Problem

hi all,

i am having a strange problem and i have tried doing googling but still not getting any strong answer to overcome the issue.

we have one partner in another country and we are trying to setup VPN Tunnel between us and this partner using PIX 515E and Checkpoint FW NXG on the other side.

configured the Crypto Map and ISAKMP and also with help from lrmoore did the natting and acl. the thing is like this.

Site 1.
crypto ipsec transform-set Partnet2 esp-3des esp-md5-hmac
crypto map transam 20 ipsec-isakmp
crypto map transam 20 match address Partnet2
crypto map transam 20 set peer 192.162.10.92
crypto map transam 20 set transform-set NI
crypto map transam 20 set security-association lifetime seconds 3600 kilobytes 4
crypto map transam interface outside
isakmp enable outside
isakmp key ******** address 192.168.10.92 netmask 255.255.255.255
isakmp identity address
isakmp keepalive 10 30
isakmp nat-traversal 20
isakmp policy 20 authentication pre-share
isakmp policy 20 encryption 3des
isakmp policy 20 hash md5
isakmp policy 20 group 2
isakmp policy 20 lifetime 86400

access-list Partner2 permit ip host 100.90.72.20 host 172.22.13.25
access-list Partner2 permit ip host 100.90.72.10 host 192.168.7.5
access-list Partner2 permit ip host 192.168.7.5 host 100.90.72.10
access-list Partner2 permit ip host 100.90.72.10 host 172.17.53.5
access-list Partner2_NAT permit ip host 172.20.4.205 host 172.16.7.5
access-list Partner2_NAT permit ip host 172.20.4.205 host 172.17.53.5
access-list Partner2_NAT1 permit ip host 172.20.4.205 host 172.22.13.25

global (outside) 20 100.90.72.10
global (outside) 30 100.90.72.20

nat (inside) 20 access-list NI_NAT 0 0
nat (inside) 30 access-list NI_NAT1 0 0


Site 2. Checkpoint FW NGX

Problem: when we initiate the connection the VPN Tunnel comes up and we can access there servers. but when they try to initiate the connection; i see on pix that  it stops at phase 2 of IPsec.

Question:

for inbound do we need something extra in ACL or simple VPN access-list works for both inbound and outbound. any help would be great, i really need it up