Problems with Jamm first login

Hi all!
I'm having trouble with Jamm's first login. I correctly setup
Postfix+Courier on the external server, and OpenLDAP+Tomcat+Jamm on the
internal server.
Tomcat is working correctly, and so OpenLDAP.
When I try to log in to Jamm with 'root' and my rootdn password, Jamm
complains:
"An unknown error has occured!
Please contact the system administrator 
We're sorry for the inconvience. Please try again later."

Tomcat error logs are:

---
Oct 19 12:21:40 ERROR [http-8080-Processor5] webapp.JammExceptionHandler
- Caught Error
jamm.backend.MailManagerException: Could not bind
at jamm.backend.MailManager.authenticate(MailManager.java:253)
at jamm.webapp.LoginAction.execute(LoginAction.java:107)
at
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
[..omissis...]
Caused by: javax.naming.InvalidNameException: [LDAP: error code 34 -
invalid DN]
at com.sun.jndi.ldap.LdapCtx.processReturnCode(LdapCtx.java:2929)
at com.sun.jndi.ldap.LdapCtx.processReturnCode(LdapCtx.java:2735)
[..omissis...]
Caused by:
javax.naming.InvalidNameException: [LDAP: error code 34 - invalid DN]
at com.sun.jndi.ldap.LdapCtx.processReturnCode(LdapCtx.java:2929)
at com.sun.jndi.ldap.LdapCtx.processReturnCode(LdapCtx.java:2735)
---
(full logs are available if they can help)

My jamm.properties is:
---
jamm.ldap.host = localhost
jamm.ldap.port = 389
jamm.ldap.search_base = o=vmailHosting,dn=e-portaltech,dn=it
jamm.ldap.root_dn = cn=Manager,dn=e-portaltech,dn=it
jamm.ldap.root_login = root
jamm.password.exop = true
jamm.vmail.homedir = /home/vmail/domains
---

My slapd.conf:
---
database        ldbm
directory       /var/lib/ldap
suffix          "dc=e-portaltech,dc=it"
rootdn          "cn=Manager,dc=e-portaltech,dc=it"
index           default         eq
index           objectClass     eq
index           cn,mail         eq,subinitial
index           phpgwContactOwner       pres,eq,sub
index           uidNumber       pres,eq
lastmod         on
access to dn=".*,jvd=([^,]+),o=vmailHosting,dc=e-portaltech,dc=it"
  attr=userPassword
  by self write
  by
group/jammPostmaster/roleOccupant="cn=postmaster,jvd=$1,o=vmailHosting,dc=e-portaltech,dc=it" write
  by anonymous auth
  by * none
access to dn=".*jvd=([^,]+),o=vmailHosting,dc=e-portaltech,dc=it"
  by self write
  by
group/jammPostmaster/roleOccupant="cn=postmaster,jvd=$1,o=vmailHosting,dc=e-portaltech,dc=it" write
  by * read
access to *
  by * read
---

And a query to LDAP:
---
[root@grana tomcat4]# ldapsearch -h localhost -x -W -D
cn=Manager,dc=e-portaltech,dc=it -b o=vmailHosting,dc=e-portaltech,dc=it
Enter LDAP Password:
# extended LDIF
#
# LDAPv3
# base <o=vmailHosting,dc=e-portaltech,dc=it> with scope sub
# filter: (objectclass=*)
# requesting: ALL
#
                                                                                                                                   
# vmailHosting, e-portaltech.it
dn: o=vmailHosting,dc=e-portaltech,dc=it
objectClass: top
objectClass: organization
o: vmailHosting
description: vmailHosting ePortal server
                                                                                                                                   
# search result
search: 2
result: 0 Success
                                                                                                                                   
# numResponses: 2
# numEntries: 1
---

I'm running OpenLDAP 2.1.29 + Apache 2.0.50 on Fedora Core 2 (both from
RPM), and I'm using Tomcat 4.1.31 + Jamm 0.9.7-rc1 from .tar.gz
binaries.

Anyone has experienced (and possibly solved) the same problem?

Thanks in advance,
-- 
Ciro Mattia Gonano
  System Engineer c/o ePortal Technologies snc
     web: http://www.e-portaltech.it
   phone: +39 0425 486036
  mobile: +39 320 9180546



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