[Exim] Mysqlclient not found?

I am trying to run some tests with my newly installed exim. I ran:

[root@trinity bin]# ./exim -bV
./exim: error in loading shared libraries: libmysqlclient.so.10: cannot
open shared object file: No such file or directory

I looked in my Local/Makefile and I have this line:
LOOKUP_LIBS=-L/usr/local/mysql/lib/mysql -lmysqlclient

i then verified that it exists:
[root@trinity exim-3.22]# ls -la
/usr/local/mysql/lib/mysql/libmysqlclient.*
-rw-r--r--    1 root     root       181248 Jan 24 16:01
/usr/local/mysql/lib/mysql/libmysqlclient.a
-rwxr-xr-x    1 root     root          721 Jan 24 16:01
/usr/local/mysql/lib/mysql/libmysqlclient.la
lrwxrwxrwx    1 root     root           24 Jan 24 16:01
/usr/local/mysql/lib/mysql/libmysqlclient.so -> libmysqlclient.so.10.0.0
lrwxrwxrwx    1 root     root           24 Jan 24 16:01
/usr/local/mysql/lib/mysql/libmysqlclient.so.10 ->
libmysqlclient.so.10.0.0
-rwxr-xr-x    1 root     root       133392 Jan 24 16:01
/usr/local/mysql/lib/mysql/libmysqlclient.so.10.0.0
[root@trinity exim-3.22]#   

So.. is there anything I am missing that would cause this error message?

Thanks!
Tanya