Could not chdir to home directory

I have just installed our new 10.4.8 server. It is currently an Open Directory Master and Windows primary domain controller. I am getting the following message when trying to authenticate as an Open Directory user from a Red Hat ES 4 box. Could not chdir to home directory /Network/Servers/mydomain.com/Volumes/hardrive/userdirectory/username: No such file or directory The file and the directory both exist as it mounts fine on an OSX client machine. I have also tried nfs to no avial. I am able to mount -t smbfs and mount the user directory. What do I need to do to make Red Hat mount any users home directory that is stored on the OS X server after authenticating to the open directory master?