modify upon the root DSE not supported

[hatim <hatnet@free.fr>]

Hi all

I m using openldap-2.0.27 in 2 servers : server1 and server2

server 1 is the master and server2 the slave

when i change some data in the master , the slave is updated without any 
problem
but when i try to modify some data in  the slave ,  the slave contacts the 
master , and i have this error in the master
conn=0 op=1 RESULT tag=103 err=53 text=modify upon the root DSE not supported


any idea ?
thank you for your help

Hatim