Problems displaying "man" pages

[Monty Andro]

Hello,

I'm looking for help on how to display man pages that I down loaded from
uunet.uu.net from the bsd-sources directory.  Specificly, I'm attempting
to display the man page for the "lock" command.  I copied the "lock.1" file
(this looks like the man page) into our /usr/man/man1 directory and typed 
"man lock".  It finds the file ok, but it doesn't display the information
in the proper format.  It just displays a non formated paragraph of the 
text without indentation or titles.  Do I need to do anything special to the
man page before copying it into the man directory ?  Do I have a incompatible
man program ?  My workstation is a Sun386i with SunOS 4.0.2.

Any help would be greatly appreciated.  

Thanks in advance,

monty