ActiveDirectoryMembershipProvider with an OpenDirectory instead-of AD?

[Jéjé]

Hi,

does it possible to use the ActiveDirectoryMembershipProvider to
authenticate a user against the opendirectory?
our client use the opendirectory instead-of the active directory.
when I try to use it, I receive this error:
Configuration error
An invalid DN syntax has been specified

any idea?
what's appends?

can I use the ActiveDirectoryMembershipProvider with an opendirectory?

thanks.

Jerome.