Bind9 DLZ error with samba4

Bind9 DLZ error with samba4

I am following the Samba wiki tutorial to set up Samba4 with Bind9 back
end. I am stuck with this error though, I am assuming the "apt-get install
bind9" does not include dlopen from the Ubuntu repo's so how can i compile
it so it will?
Aug 17 19:14:28 wwdev-DC named[1511]: Loading 'AD DNS Zone' using driver
dlopen
Aug 17 19:14:28 wwdev-DC named[1511]: samba_dlz: Failed to connect to
/var/lib/samba/private/dns/sam.ldb
Aug 17 19:14:28 wwdev-DC named[1511]: dlz_dlopen of 'AD DNS Zone' failed
Aug 17 19:14:28 wwdev-DC named[1511]: SDLZ driver failed to load.
Aug 17 19:14:28 wwdev-DC named[1511]: DLZ driver failed to load.
Aug 17 19:14:28 wwdev-DC named[1511]: loading configuration: failure
Aug 17 19:14:28 wwdev-DC named[1511]: exiting (due to fatal error)
Thanks! Nat