I have been trying to get Zimbra running on my Fedora 4 box - but i haven't got that far - I keep receiving an error which states that LDAP has received an error I have tried installing it several times but i get the same error

Does anyone know if there are any logs I should check or are there some tests I can perform:-

This is the error ive been getting -

Save config in file: [/opt/zimbra/config.3957]
Saving config in /opt/zimbra/config.3957...Done
The system will be modified - continue? [No] y
Operations logged to /tmp/zmsetup.log.3957
Initializing ldap...FAILED (256)

Any help would be greatly appreciated thanks