[Exim] Troubles with AUTH

I tried to configure exim 3.040 with authentification ...


Here is my "configure settings" :
- I added host_auth_accept_relay = *
- I "ended" the rewriting rules with "end" keyword
- I added after the rewriting rules the following text :

----
fixed_login:
driver = plaintext
public_name = LOGIN
server_condition = "${if and {{eq{$2}{ph10}}{eq{$3}{secret}}}{yes}{no}}"
server_set_id = $2
server_prompts = "Username:: : Password:"
----

I configured my Outlook Express 5.0 with the following properties :

My server needs auth + "ph10" and "secret" as login / password ...

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In my OE output, I can read "334 UGFzc3dvcmQ=", Unknown error (translation
is approximative, French OE)

---

I launched exim with -d5 option, here is the output ...

250-lebac.net Hello dell1 [195.101.94.7]
250-SIZE
250-PIPELINING
250-AUTH LOGIN
250 HELP
SMTP<< AUTH LOGIN
334 VXNlcm5hbWU6
334 UGFzc3dvcmQ=
fixed_login authenticator:
$1 = ph10
expanded string: no
535 Incorrect authentication data
LOG: 0 MAIN REJECT
Authentication failed for (dell1) [195.101.94.7]: 535 Incorrect
authentication data

---

Could anyone help ?

Thank's !

Georges