[stunnel-users] cert verification problem

[n n]

Hi! I want to authenticate server, using valid cert from StartSSL, and
I receive error:
##
sie 07 16:24:17 yabba stunnel[4247]: LOG4[5495]: CERT: Verification
error: unable to get local issuer certificate
sie 07 16:24:17 yabba stunnel[4247]: LOG4[5495]: Certificate check
failed: depth=1, subject=/C=IL/O=StartCom Ltd./OU=Secure Digital
Certificate Signing/CN=StartCom Class 1 Primary Intermediate Server CA
sie 07 16:24:17 yabba stunnel[4247]: LOG3[5495]: SSL_connect:
14090086: error:14090086:SSL
routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
sie 07 16:24:17 yabba stunnel[4247]: LOG5[5495]: Connection reset: 0
byte(s) sent to SSL, 0 byte(s) sent to socket
##

I don't know what's wrong.
There is server's config:
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chroot = /var/run/stunnel/
pid=/stunnel.pid
setuid = nobody
setgid = nobody

[squid]
accept = 80
connect = 127.0.0.1:3128
verify=0
##

Client's config:

##
client = yes

[proxy]
accept = 127.0.0.1:8005
connect = server:80
##