Accessing CVS from a remote machine

[Bekai]

I am new to both linux and CVS and have the task of setting CVS up on a
linux box so that it can host our projects.
I installed Red Hat 7.0 and was able to import , checkout  locally, but
when I try to access it from a windows or Mac client, I get the
following error message.

"(Logging in to cvs -d :pserver: address@hidden)
cvs login: authorization failed: server remote.server.com rejected
access to /home/myaccount/cvsproject/CVSROOT for user cvs -d :pserver:
user"

I have tried several of the suggestions in the online documentations and
website without any success.
Does anyone know the specific meaning of this error message.
Thank you
Bek