LDAP issues with 5508 WLC

I have deployed two wlans with two LDAP servers and different OU configurantion in each LDAP.
WLC5508 software 7.2.110
wlan id 1 is set to LDAP server1
wlan id 4 is set to LDAP server2
tests
user server1 connect to wlan1
user server1 connect to wlan4    - this should not happen
user server2 connect to wlan4
user server2 connect to wlan1     - this should not happen                  
This scenario already work fine on WLC 4400 with software 7.0.116
Anyone already has a similar problem?
thanks,
Murilo Cavallini

Both DataBase is created on the same AD, but this Server has 2 network interface.
wlan1 is set to LDAP Server2: IP address 10.19.198.254
show ldap 2
Server Index..................................... 2
Address.......................................... 10.19.198.254
Port............................................. 389
Enabled.......................................... Yes
User DN.......................................... OU=Convidados,DC=wlan,DC=tvg,DC=com,DC=BR
User Attribute................................... sAMAccountName
User Type........................................ Person
Retransmit Timeout............................... 2 seconds
Bind Method ..................................... Anonymous
*LDAP DB Task 1: Oct 25 09:13:08.716: Attempting user bind with username CN=didatagm,OU=GloboMobile,DC=wlan,DC=tvglobo,DC=com,DC=br
Server Index..................................... 2
Address.......................................... 10.19.198.254
Port............................................. 389
Enabled.......................................... Yes
User DN.......................................... OU=Convidados,DC=wlan,DC=tvg,DC=com,DC=BR
User Attribute................................... sAMAccountName
User Type........................................ Person
Retransmit Timeout............................... 2 seconds
Bind Method ..................................... Anonymous
wlan2 is set to LDAP Server1: IP address 10.19.198.176
show ldap 1
Server Index..................................... 1
Address.......................................... 10.19.198.176
Port............................................. 389
Enabled.......................................... Yes
User DN.......................................... OU=Mobile,DC=wlan,DC=tvg,DC=com,DC=BR
User Attribute................................... sAMAccountName
User Type........................................ Person
Retransmit Timeout............................... 2 seconds
Bind Method ..................................... AnonymousServer Index..................................... 1
Address.......................................... 10.19.198.176
Port............................................. 389
Enabled.......................................... Yes
User DN.......................................... OU=Mobile,DC=wlan,DC=tvg,DC=com,DC=BR
User Attribute................................... sAMAccountName
User Type........................................ Person
Retransmit Timeout............................... 2 seconds
Bind Method ..................................... Anonymous
This is the problem that I can see:
Auth. Request is sent:
*LDAP DB Task 2: Oct 25 09:13:08.710: ldapAuthRequest [2] called lcapi_query base="OU=Convidados,DC=wlan,DC=tvg,DC=com,DC=BR"       type="Person" attr="sAMAccountName" user="didatagm" (rc = 32 - No such object)
Binding with the user with database:
*LDAP DB Task 1: Oct 25 09:13:08.716: Attempting user bind with username CN=didatagm,OU=Mobile,DC=wlan,DC=tvg,DC=com,DC=br
WLC is requesting for LDAP SERVER2 and is binding for LDAP SERVER1. This issue is occuring only sometimes.
thanks a lot.

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