I'm trying to run split testing on some landing pages I "designed" with Unbounce, but it requires that I set the CNAME record for my domain/sub-domain and I'm having trouble figuring out what is the right way to do it. My host is arvixe (www.arvixe.com) and their customer support has failed to help me for the past 5 days (I spoke to them multiple times).

I followed the directions for setting the CNAME record and I was able to set the CNAME record, but I'm consistently unable to verify that the CNAME record is set up correctly. I followed the instructions on Unbounce to verify the CNAME record for my sub-domain (beta.devboost.com) and here are the results:

No records found
reverse lookup  smtp diag   port scan   blacklist

Reported by ns1.SNARE.arvixe.com on Thursday, November 10, 2011 at 5:49:57 PM (GMT-6)

Here is my DNS zone record from the control panel of my host (last record, CNAME unbouncepages.com):

Is there something wrong with my DNS Zone Record? What's the right way to do this?

Update:
I also have a CNAME record for beta in my root domain (devboost.com):

I've updated my sub-domain record now: I've removed most of the other DNS records and I've removed the beta label for the CNAME record:

Is that correct? Is there anything else I need to do?