hi @arjava
I believe the issue is that the key was generated outside of the Java Key Store which java doesn’t like
have a read of this http://stackoverflow.com/questions/906402/importing-an-existing-x509-certificate-and-private-key-in-java-keystore-to-use-i
as you have openssl it should be straightforward to generate the pfx and import that
I also suggest that you import the intermediate certs as well
Andrei