LDAP login no possible

I have configured LDAP to connenct to our AD enviroment, it work i am able to load users form AD and import them, also i have set some users to admin group but when i try to log in it does nothig, no matter is it web client or pc client, just returns to login without error info, also there is no errors in log files…

Can you assist here.

hers soem basic info, in web xml file ldap is enabled

classpath:sernet/gs/server/spring/veriniceserver-security-plain-ldap.xml
And LDAP settings
ldap.protocol=ldap
ldap.server=1x.1x.x.1
ldap.port=389
ldap.base=
ldap.groupfilter=
ldap.userfilter=
ldap.search.user=
ldap.search.password=
ldap.prefix=
ldap.suffix=
ldap.guestuser=LDAP_GUEST
ldap.import.base=OU=company,DC=domain,DC=corp
ldap.import.filter=(&(objectClass=user)(memberOf=CN=VeriNice_Users,OU=Gruppen,OU=company,DC=domain,DC=corp))
ldap.import.user=userforldap@company.de
ldap.import.password=passofuserforldap