I have a problem with Pound for days,still not solved.

I configure Pound to ask for client certiificae,

my pound configure file is below:

LogLevel 2
Alive 30
ListenHTTPS
   Address 192.168.11.8
   Port 443
   xHTTP 0
   WebDAV 0
   Client 1
   Change30x 1
   Cert "/ws/Pound-2.0.1/me.pem"
   CAlist "/ws/Pound-2.0.1/fjroot.pem"
   #VerifyList "/ws/Pound-2.0.1/fjca.pem"
   ClientCert 2 2
   NoHTTPS11 2
   Ciphers "ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP:+eNULL"
   Service
   #   URL ".*"
      BackEnd
       Address 192.168.11.3
       Port 80
       Priority 1
     End
      Session
        Type IP
        TTL 300
      End
   End
End

when client -IE ,chose the certificate in certificate selection dialog,

we can now see this line in Pound logfile

BIO_do_handshake with 192.168.1.35 failed:
error:140890B2:SSLroutines:SSL3_GET_CLIENT_CERTIFICATE:no certificate
returned

where ClientCert 2 2 change to Client 0 2 ,ask no certificate ,everything is OK.

openssl is openssl 0.9.8a