I am going to try and help. This is the first time that I've actually tried to help. So everyone, please be patient. We had the exact same problem.
Here is the login script that we use:
map root h:=\\itc-app\HOME\faculty\%CN
itc-app is the server,
HOME, COURSES, SHARED are the volumes in the DATA Pool,
faculty is the directory that stores all of the users' home drives,
and %CN maps the usernames (including usernames that have over 8 characters)
This script works, if your server is Linux with EVMS as the Volume Manager.
Here is an informative link, which is our server set-up.
Then click on the third link about Modifying.
Then you must create a DATA Pool and your Volumes with either nssmu from the command line or iManager. There is some tweaking required with rights and permissions once your directories are put into the Volumes. But then you'll be mapping all your NSS Volumes and you'll be able to run your Network Apps.
Hopefully, this helps and will help others.