Now I use following commands to generate keys
Qt Code: 
  1. ./CA.pl -newca
  2. ./CA.pl -newreq-nodes
  3. ./CA.pl -signreq
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CA certificate is generated in demoCA/cacert.pem
Private key is newkey.pem
Signed certificate is newcert.pem

On the server I use
demoCA/cacert.pem as argument for addCaCertificate()
newcert.pem as argument for setLocalCertificate()
newkey.pem as argument for setPrivateKey()
On the client I use
demoCA/cacert.pem as argument for addCaCertificate()
demoCA/cacert.pem is public

How about now?