Cognos 8 -> Changing External Namespace ID

[remipop]

Hello,

I've 2 cognos 8 platform on 2 server.
They use a single LDAP on an other server (width access manager).
The problem : they don't have the same Namespace ID in cognos configuration => When I export contents from the first to the second, user rights are losed...

I've try to modify the content manager db but not working...

Is it possible with SDK to correct this problem ?

Thanks