Mapped Domain Status is invalid

Hi all,

I'm having trouble with the Domain Mapping plugin. I've read through the other threads related to this issue but it seems like all of the bugs have not been resolved.

I upgraded to 4.0.2 and the sites on that were already mapped are marked as "valid." However, I tried to map a new site and the status is "invalid."

The domain has been in existence for a long time. I was just making upgrades to their site and moving it to my multi-site install.

I've downgraded to the version that was working before but it hasn't seemed to correct itself.

Please advise. Thanks.