monitoring a file

I am wanting to monitor a file to make sure it doesn't get any smaller
than 500k. This is on a remote machine that has the client software
setup on it. On the remote machine i put this entry in the
localclient.cfg that looked like this: FILE /export/home/dncs/mystro/bfs/Compass_OOB/rt.grp.z SIZE<800

I am not getting anything to report back on the BBDISPLAY though. any
ideas would be appreciated.