Informix with NIS

We are installing NIS on our Network. One of the problems that we have run in to is that Informix Products seem to need a physical entry in the passwd file. While UNIX is smart enough to use NIS at log in time, Informix apps like dbaccess error out with a "-468 Cannot obtain user id from system: unable to start database server." When I issue an id command it returns my User and Group name and id's so I know that UNIX considers me a legitimate user. This implies that Informix is trying to read the passwd and group files on its own. Has any one else had problems with this? Is there a work around? JD Hicks Virtual Solutions, Inc Dallas, TX