I've installed ZCS 8.0 on ubuntu 12.04 LTS, then tried to install commercial certificate.

Already create CSR, and got the certificate from rapidssl. Then I was trying to deploy, but got these errors:

root@mail:/opt/zimbra/ssl/zimbra/commercial# /opt/zimbra/bin/zmcertmgr deploycrt comm commercial.crt /tmp/ca_bundle.crt
** Verifying commercial.crt against /opt/zimbra/ssl/zimbra/commercial/commercial.key
unable to load certificate
140668292994720:error:0906D06C:PEM routines:PEM_read_bio:no start lineem_lib.c:696:Expecting: TRUSTED CERTIFICATE
XXXXX ERROR: Unmatching certificate (commercial.crt) and private key (/opt/zimbra/ssl/zimbra/commercial/commercial.key) pair.
XXXXX ERROR: provided cert isn't valid.

Does any one could help me please, I would be high appreciated for this help.