Cpanel says by private key doesn't match the certificate

I’m new here so hi.

Cpanel says my private key doesn’t match the certificate.
This isn’t the first time this has happened and after searching the internet I decide to start over.
When I made my new CSR on my sever I keep the info -----BEGIN CERTIFICATE REQUEST---- to it’s ending and -----BEGIN RSA PRIVATE KEY----- to it’s ending.
I was assuming the RSA PRIVATE KEY was the key I needed.
However the same issue as a raisin, Cpanel says my private key doesn’t match the certificate.
How do I fix this problem?

Thanks

Please submit a support ticket through https://support.comodo.com so that we may better assist you.

Thanks Sal, will do.