Commercial Certificate RapidSSL

[haxxess]

I have been having problems trying to install a Commercial Certificate from GeoTrust - RapidSSL, I can generate the CSR no problem and process the certificate at GeoTrust but when verifying the certificated I receive

XXXXX ERROR: Unmatching certificate (/opt/zimbra/ssl/zimbra/commercial/commercial.crt) and private key (/opt/zimbra/ssl/zimbra/commercial/commercial.key) pair.

I have tried using the command line and GUI without any success.
I have been following the wiki and other resources in the forum without any luck.
The process I have been using is.

Generate the CSR

sudo /opt/zimbra/bin/zmcertmgr createcsr comm -new "/C=US/ST=TX/L=Somewhere/O=Company, Inc./OU=ChangeMe, Inc./CN=mail.CHANGEME.zxy"

Obviously using my appropriate details.
This creates the CSR in /opt/zimbra/ssl/zimbra/commercial/commercial.csr

Submit CSR to RapidSSL
NOTE: during the certificate process at GeoTrust I selected "other" as the server type, could this be a problem?
Once the administrator email address has been verified a email is received with two digital certificates, one is the INTERMEDIATE CA and other your digital cert(im not sure what this certificate is called).
Saved the digital certificate into /opt/zimbra/ssl/zimbra/commercial/commercial.crt (from memory there was already a file here, replaced contents)
Then according to this wiki post we need to download the Geotrust root certificate and the RapidSSL_CA_bundle and combine them into a files called ca_bundle.crt
Saved this ca_bundle.crt into /opt/zimbra/ssl/zimbra/commercial

Verify the Certificate and Keys match

 sudo /opt/zimbra/bin/zmcertmgr verifycrt comm /opt/zimbra/ssl/zimbra/commercial/commercial.key /opt/zimbra/ssl/zimbra/commercial/commercial.crt

This is when I receive the error mentioned above about the certificates not matching.

Can somebody please help me with installing this commercial digital certificate, any advice or pointers will help
Thanks

[mstroven]

I'm having the same problem with Zimbra 8, only I'm trying to install a Thawte SSL cert...