installing saba says TypeError: in method 'Ldb_set_modules_dir'

[contact at ibiocom.org]

I'm trying to install samba 4 following this documentation  
http://wiki.samba.org/index.php/Samba4/HOWTO#Step_4:_Provision_Samba4

Make quicktest output this:

Traceback (most recent call last):
   File "./setup/provision", line 264, in <module>
     useeadb=eadb, next_rid=opts.next_rid, lp=lp)
   File "bin/python/samba/provision.py", line 1512, in provision
     schema = Schema(setup_path, domainsid, invocationid=invocationid,  
schemadn=names.schemadn)
   File "bin/python/samba/schema.py", line 78, in __init__
     self.ldb = SamDB(global_schema=False, am_rodc=False)
   File "bin/python/samba/samdb.py", line 52, in __init__
     options=options)
   File "bin/python/samba/__init__.py", line 76, in __init__
     self.set_modules_dir(default_ldb_modules_dir)
TypeError: in method 'Ldb_set_modules_dir', argument 1 of type 'ldb *'
Unable to provision:
NSS_WRAPPER_PASSWD="/home/gwenola/samba-master/source4/st/dc/etc/passwd"  
NSS_WRAPPER_GROUP="/home/gwenola/samba-master/source4/st/dc/etc/group"  
./setup/provision  
--configfile=/home/gwenola/samba-master/source4/st/dc/etc/smb.conf  
--host-name=localdc --host-ip=127.0.0.1 --quiet --domain=SAMBADOMAIN  
--realm=SAMBA.EXAMPLE.COM --adminpass=locDCpass1  
--krbtgtpass=krbtgtlocDCpass1 --machinepass=machinelocDCpass1  
--root=gwenola --server-role="domain controller" --function-level="2008"
no output for name[samba4.smb.signing --signing=required anon(dc)]

Some help would be apreciated.