eap: Module instantiation failed

[Alexey Plutakhin]

Hello!
I'm trying to use 802.1x according 
http://www.tldp.org/HOWTO/8021X-HOWTO/freeradius.html#confradius . But 
when I start radiusd -X, it write out next message:
.....
tls: check_cert_cn = "(null)"
rlm_eap_tls: Loading the certificate file as a chain
68047:error:0200100E:system library:fopen:Bad 
address:bss_file.c:349:fopen('','r')
68047:error:20074002:BIO routines:FILE_CTRL:system lib:bss_file.c:351:
68047:error:140DC002:SSL 
routines:SSL_CTX_use_certificate_chain_file:system lib:ssl_rsa.c:720:
rlm_eap_tls: Error reading certificate file
rlm_eap: Failed to initialize type tls
radiusd.conf[10]: eap: Module instantiation failed.
radiusd.conf[1893] Unknown module "eap".
radiusd.conf[1840] Failed to parse authenticate section.

All conf files are same with HOWTO. I tryed to reinstall radius and 
openssl, but it didn't help.
Anybody knows, how to resolve problem?