Cannot found clsql while installing it to Allegro Common Lisp

hello everybody,
 I'm a newbie to Common Lisp for two weeks. I choose Allegro Common
Lisp 8.1 as my platform and I wish to use CLSQL to communicate to
MySQL server.
 I followed the user guide of CLSQL as the follows,

(require :asdf)
NIL <-- asdf.fasl is in C:\Program Files\acl81-express\code but cannot
be loaded as webactions.

(load "asdf.lisp")
T

(push #P"c:/program files/lispbox-0.7/uffi-1.6.0/" asdf:*central-registry*)
(push #P"c:/program files/lispbox-0.7/clsql-4.0.3/" asdf:*central-registry*)
(#P"C:\\Program Files\\LispBox-0.7\\uffi-1.6.0\\"
 #P"C:\\Program Files\\LispBox-0.7\\clsql-4.0.3\\"
 *DEFAULT-PATHNAME-DEFAULTS*)

(asdf:operate 'asdf:load-op 'clsql)
"conponent "clsql" not found" message was shown.

I treid asdf.lisp comes with Allegro and downloaded from Cliki but neither work.

>Holger Schauer Holger.Schauer at gmx.de
>Tue Mar 11 03:29:35 MDT 2008

>(loop for dir in asdf:*central-registry*
>      when (directory (merge-pathnames "clsql.asd" (eval dir)))
>	   collect (eval dir))

I done the above lines in allegro and received (#P"clsql-4.0.3\\") as response.
I have tried out CLSQL in SBCL as the original post and it works fine.
Thus, It seems that asdf:*central-registry* doesn't work in Allegro.
What can I do to resolve this problem? Thanks.

--------------------
Zhong Da Jun