Problem with push server

Hi there,

we have set up a mattermost server and a server for the push-service. We followed the documentation, but when we try to fire up a push-message like this:

curl http://127.0.0.1:8066/api/v1/send_push -X POST -H "Content-Type: application/json" -d '{ "message":"test", "badge": 1, "platform":"apple", "server_id":"de.xxxxxxx.Mattermost", "device_id":"000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"}'

the log shows this error message:
``
ERROR Failed to send apple push sid=de.xxxxxxx.Mattermost did=000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF err=crypto/tls: failed to parse certificate PEM data

The Push config:

{
    "ListenAddress": ":8066",
    "ApplePushServer": "gateway.push.apple.com:2195",
    "ApplePushCertPublic": "/opt/matterpush/bin/MattermostPushPrivatePem_new.pem",
    "ApplePushCertPrivate": "/opt/matterpush/bin/MattermostPushPrivatePem_new.pem",
    "ThrottlePerSec": 100,
    "ThrottleMemoryStoreSize": 10000,
    "ThrottleVaryByHeader": "X-Forwarded-For"
}

We verified the certificate ok:

root@08786a57720f:/opt/matterpush/bin# openssl verify MattermostPushPrivatePem_new.pem 
MattermostPushPrivatePem_new.pem: OK

Any ideas?

Thanks,
Patric