Ruby Savon wsdl file and program getting ssl error

Hi Guys I'm getting the following errors when trying to execute this program. I have no idea how to correct it.

unable to get local issuer certificate

`rescue in request': SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (HTTPI::SSLError)

require 'rubygems'
require 'savon'
require 'httpclient'
require 'openssl'

HTTPI.adapter = :httpclient

client = Savon.client do
ssl_ca_cert_file '/etc/pki/tls/certs/ca-bundle.crt'
wsdl '/TelematchWebservices.wsdl'                         
end

$xml = IO.read("test.xml")

response = client.call(:test)    
response.body

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