NTop problem on OpenBSD

[Nathan Lloyd]

I have 2 machines running OpenBSD 2.7, and the faster of the two seems to be
incapable of running NTop (as well as TrafShow), however Snort and TCPDump run
fine..

The error it gives me for NTop is:

/usr/libexec.sd.so: trafshow: libcurses.so.8.0: No such file or directory

Can you give me some insight as to what this error means?  It only happens on 
the faster of my 2 systems..

-thanks in advance for any help..
-Nathan Lloyd