Cannot create more than one certificate

Hi,

I try to implement EAP/TLS for network users in company I work.
Authentication is works only for one certificate. When I create a second
certificate and concatenate with the first certificate using 'cat', both
certificates does not work . The error it gives is shown below (error is in
the last line),

auth: type "EAP"
Processing the authenticate section of radiusd.conf
modcall: entering group authenticate for request 37
rlm_eap: Request found, released from the list
rlm_eap: EAP/tls
rlm_eap: processing type tls
rlm_eap_tls: Authenticate
rlm_eap_tls: processing TLS
rlm_eap_tls: Length Included
eaptls_verify returned 11
(other): before/accept initialization
TLS_accept: before/accept initialization
rlm_eap_tls: <<< TLS 1.0 Handshake [length 0041], ClientHello
TLS_accept: SSLv3 read client hello A
rlm_eap_tls: >>> TLS 1.0 Handshake [length 004a], ServerHello
TLS_accept: SSLv3 write server hello A
rlm_eap_tls: >>> TLS 1.0 Handshake [length 0274], Certificate
TLS_accept: SSLv3 write certificate A
rlm_eap_tls: >>> TLS 1.0 Handshake [length 0078], CertificateRequest
TLS_accept: SSLv3 write certificate request A
TLS_accept: SSLv3 flush data
TLS_accept:error in SSLv3 read client certificate A


I hope somebody from the list can help me.

Thanks.

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