Problem linking in C code

[akcom]

I'm trying to link some C code into my D program.  I'm doing the following 
(using DMC to retain object file compatbility):

>dmc.exe aes.c aes.h -c
>lib
Digital Mars Librarian Version 8.00n
Copyright (C) Digital Mars 2000-2002 All Rights Reserved www.digitalmars.com
library file        (.lib) aes.lib
create new library (Y or N)? Y
action-object [-+*] (.obj) aes.obj
list file           (.lst)

Digital Mars Librarian complete.
>build aesc.d aes.lib
OPTLINK (R) for Win32  Release 7.50B1
Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved

aes.lib
 Warning 140: Library probably needs FIXLIB
aesc.obj(aesc)
 Error 42: Symbol Undefined _aes_set_key

Any suggestions as to how to resolve the linking issue?

Regards,
Alex