[Exim] Exim + radius

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Hello exim-users,

      Does anybody use or already have used exim authenticating directly on a radius server ?

     I'm using the command "server_condition = ${if radius{<arguments>}{yes}{no}}" like the doc. tell,
 but I only see the message on mainlog: "535 Incorrect authentication data" and runnig a tcpdump
I see that my exim box doesn't send any packet to radius server.

      Any suggestion will be welcome.

Exim-4.22 + radiusclient-0.3.1

auth_plain:
driver = plaintext
public_name = PLAIN
server_condition = "${if radius{$2$3}{yes}{no}}"
server_set_id = $2

auth_login:
driver = plaintext
public_name = LOGIN
server_prompts = "Username:: : Password::"
server_condition = "${if radius{$1:$2}{yes}{no}}"
server_set_id = $1

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     Atenciosamente,
    Aurélio Ribeiro Costa
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Administração de Redes Diginet
       Fone: 84 4008 9000
 mailto: adm.aurelio AT digi DOT com DOT br
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