[Samba] Problem with UID

[Markova Olga]

Hello!
I have two linux-based server (eg. server1 and server2) that are members of Windows-2000-domain TEST.
On Server1 there's folder EXCHANGE with ACL permission shared through samba-3.0.10:
drwxr-xr-- "TEST\user" "TEST\domain users"  EXCHANGE
it works OK for domain users and the owner (TEST\user) can control permissions.
Now I want to copy the data from this folder (EXCHANGE) to Server2 with the same ACL-permissions for domain users.
For this I've done:
1. Server2 joined to domain TEST (net rpc join -S PDC -U admin)
wbinfo -g --> OK
wbinfo -u --> OK
2. mount //server1/EXCHANGE to server2 to folder /mountExchange
BUT!
mounted folder has permission like this: 
#drwxr-xr-- 15878 TEST\domain users   /mountExchange
So, when I copy  the data from mounted folder to local folder (cp -rpa <fromdir> <todir>), files are also copied with unrecognized UID:
#drwxr-xr-- 15892 TEST\domain users   /mount/Exchange/soft
# cd ./soft
#rwxr-xr-- 15892 TEST\domain users   /mountExchange/soft/README.txt

as you can see UID doesn't match on servers.

some conf files:
Server1
smb.conf (samba-3.0.14)
[global]
        workgroup = TEST
        server string =
        security = DOMAIN
        log file = /var/log/samba/%m.log
        max log size = 50
        acl compatibility = win2k
        socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
        dns proxy = No
        idmap uid = 15000-20000
        idmap gid = 15000-20000
        map acl inherit = Yes
[exchange]
        path = /public/exchange
        valid users = "TEST\domain users"
        admin users = TEST\admin
        read only = No
        vfs objects = recycle, extd_audit
        recycle:touch = yes
        recycle:keeptree = yes
        recycle:repository = Trash/%U

Server2
smb.conf (samba-3.0.25b)
[global]
        workgroup = TEST
        server string =
        security = DOMAIN
        log file = /var/log/samba/%m.log
        max log size = 50
        acl compatibility = win2k
        idmap uid = 15000-20000
        idmap gid = 15000-20000
        map acl inherit = Yes
 
SID of domain users are the same on both servers:
Server1
#wbinfo -n "TEST\user"
#wbinfo -S S-1-5-21-4219080837-1407974555-4163626113-1379
15342
Server2
#wbinfo -n "TEST\user"
#wbinfo -S S-1-5-21-4219080837-1407974555-4163626113-1379
15002

Does anybody know why UID doesn't migrate from one server to another?
Thanks for any idea!
Igor