ldap.ENCODING_ERROR when trying to use SimplePageResultsControl

[Zhang Huangbin]

I had the same error here while run Demo/page_control.py:

----
Traceback (most recent call last):
  File "1.py", line 23, in ?
    serverctrls=[lc]
  File 
"/usr/lib64/python2.4/site-packages/python_ldap-2.3.6-py2.4-linux-x86_64.egg/ldap/ldapobject.py", 
line 501, in search_ext_s
    msgid = 
self.search_ext(base,scope,filterstr,attrlist,attrsonly,serverctrls,clientctrls,timeout,sizelimit)
  File 
"/usr/lib64/python2.4/site-packages/python_ldap-2.3.6-py2.4-linux-x86_64.egg/ldap/ldapobject.py", 
line 495, in search_ext
    EncodeControlTuples(serverctrls),
  File 
"/usr/lib64/python2.4/site-packages/python_ldap-2.3.6-py2.4-linux-x86_64.egg/ldap/controls.py", 
line 110, in EncodeControlTuples
    result = [
  File 
"/usr/lib64/python2.4/site-packages/python_ldap-2.3.6-py2.4-linux-x86_64.egg/ldap/controls.py", 
line 45, in getEncodedTuple
    return 
(self.controlType,self.criticality,self.encodeControlValue(self.controlValue))
  File 
"/usr/lib64/python2.4/site-packages/python_ldap-2.3.6-py2.4-linux-x86_64.egg/ldap/controls.py", 
line 78, in encodeControlValue
    return _ldap.encode_page_control(size,cookie)
ldap.ENCODING_ERROR
----

My env:
OS: RHEL 5.3, x86_64
Python: 2.4.3-24.el5 (shipped within RHEL 5.3)
python-ldap: 2.3.6 (installed from source tarball)
OpenLDAP: 2.3.43-3.el5 (shipped within RHEL 5.3)

How can i solve it?

-- 
Best regards.

Zhang Huangbin

- Open Source Mail Server Solution for RHEL/CentOS 5.x:
  http://code.google.com/p/iredmail/