M2Crypto - Unable to get local issuer certificate

[shubhvid]

I am trying to set up a peer-authentication mechanism using X509 certs/SSL using M2Crypto.

I generate a root CA (issuer & subject = ca_hostC...) on the client (hostC)
I sign the client Cert locally with this CA (issuer: ca_hostC, subject: hostC) and generate a csr on hostS, copy it to hostC, sign it using the root CA, ca_hostc and move the ca_cert and the signed cert to the hostS.

I generate context:

import M2Crypto.SSL as SSL
ctx = SSL.Context('tlsv1')
ctx.load_cert('x.crt', 'private/x.key')
ctx.load_verify_locations(cafile='ca.crt')
 

I connect:

s = SSL.Connection(ctx)
s.connect(server_address)
 

but on the client I get

ERROR: 20
unable to get local issuer certificate
 

however when I print the subject and issuer of the cert received from the server, I see correct info. Also, the cert is verifiable from the openssl command line util.

Any thoughts??