Cannot Create Site With 2nd Domain

Hi There,

I have installed the Multi-Domains plugin with no problem. I can create sites using the original domain e.g. However, when I tested creating websites using my second domain e.g., it did not worked. After I hit "Add Site" button, it redirects me instead to that second domain, which is page not found.

By the way, I have already configured the wildcard sub-domain of my second domain to point it to the IP of my WordPress installation.

What could be the problem?

Thank you.