[Modcaml] trouble building cocanwiki

[Eric Stokes]

Hello, I'm evaluating using cocanwiki (1.3.20) as the basis for a  
portal project on our campus, but I'm having trouble building it.  
I've had no problems getting mod_caml running, and I've installed,

ocamldbi-0.9.11
postgres-20040120
(and other deps)

I get the following error

ocamlc -w s -I +apache -I /opt/godi/lib/ocaml/pkg-lib/pcre -I /opt/ 
godi/lib/ocaml/site-lib/dbi -I /opt/godi/lib/ocaml/pkg-lib/extlib -I / 
opt/godi/lib/ocaml/pkg-lib/netstring -I /opt/godi/lib/ocaml/pkg-lib/ 
calendar -I lib -c lib/cocanwiki_create_host.ml
The implementation lib/cocanwiki_create_host.ml
does not match the interface lib/cocanwiki_create_host.cmi:
Values do not match:
  val create_host :
    < prepare_cached : string ->
                       < execute : ([> `Bool of 'b
                                     | `Int of int
                                     | `Null
                                     | `String of 'c ]
                                    as 'a)
                                   list -> unit;
                         fetch1 : unit -> 'a list; finish : unit -> 'd;
                         names : string list; serial : string ->  
int64; .. >;
      .. > ->
    'c -> 'c list -> int -> 'c -> 'c -> 'c -> 'b -> 'c option -> int
is not included in
  val create_host :
    Dbi.connection ->
    string ->
    string list ->
    int -> string -> string -> string -> bool -> string option -> int
make[1]: *** [lib/cocanwiki_create_host.cmo] Error 2
make[1]: Leaving directory `/homedirs/users10/chem/eric/ 
cocanwiki-1.3.20/scripts'
make: *** [all] Error 2

It looks like the interface to Dbi has changed?