Private key does not match with GoDaddy SSL cert

Experts,

I am having difficulty with importing a GoDaddy SSL cert into a hosted web server.This is for a Help Desk ticketing system that is hosted by Samanage. The UI for the ticketing system allows me to copy and paste the cert and update. After updating through the Samanage UI, I was hoping that the expiring cert would show a new expiration date that would reflect 2016. When I select update I get

Private Key Match:  Certificate does not match private key

Here is what I have done so far:

1. I created a CSR on server 2012 CA
2. Copied the CSR. Logged into GoDaddy and and selected re-key the certificate (the cert expires on 8/6/15 so I am assuming I have to rekey)
3. Pasted the CSR into the GoDaddy site
4. Submitted the request and GoDaddy processed the SSL.
5. Downloaded the zip file from GoDaddy which contained two files two files
6. Installed the cert that points to the FQDN of the website Im working with, on the 2012 server that generated the CSR. I then exported the cert in base-64 format and saved to the desktop.
7.I opened the cert in notepad, copied and pasted the cert into the Samanage UI
8. I then get the following- private key does not match.

Issuer:  Go Daddy Secure Certificate Authority - G2, GoDaddy.com, Inc.
Valid From:  July 27, 2015
Valid To:  August 06, 2016
Serial Number:  12905981719002934185
Private Key Match:  Certificate does not match private key

Please note that step 6 7 and 8 was advised by GoDaddy.
Any advice would be greatly appreciated!

Thank you in advance!