[Exim] Exim suddenly does not start.

I have been running Exim 3.22 on FreeBSD 4.3 smoothly for several weeks. I
needed to
restart Exim to send some thawed messages. When I attempted to do this, I
received this error:

/usr/libexec/ld-elf.so.1: Shared object "liblber.so.1" not found

Now I received this error every time I (attempt) to start Exim. What does
this mean and how do I fix it?

Sean