fatal server error

[Ted Parks]

Running version 4.8, when I try to launch Windowmaker as user, I get

Fatal server error
Cannot move old logfile "/var/log/XFree86.0.log.old."

I have tried deleting XFree86.0.log.old, making a blank one, and 
changing permissions to allow root and user to write to and execute the 
file. Also, I have tried changing owners from root to user. Nothing I 
have done works.

Any ideas? What's weird to me is that Windowmaker launches no problem 
from root.

Thanks,
Ted Parks