Publishing Node.ACS project in own domain

Hi all.

I have this problem.

For now I published my test app in ACS and is working fine with the original and CNAMEd urls (985534blahblah.cloudapp.appcelerator.com and I did a CNAME change like myapptest.cloudapp.appcelerator.com)

It's suppose that, to use my own domain, I must change de DNS settings in my provider to point CNAME to 985534blahblah.cloudapp.appcelerator.com, right? The problem is that my provider doesn't accept so big CNAME urls, asking me to use a smaller CNAME url.

So I decided to use my own CNAME in appcelerator using the console command acs cname (myapptest.cloudapp.appcelerator.com), that is smaller.

It is suppose that the path to follow now is:

1. user types dev.mydomain.com
2. dev.mydomain.com points towards myapptest.cloudapp.appcelerator.com
3. myapptest.cloudapp.appcelerator.com points towards 985534blahblah.cloudapp.appcelerator.com
4. The page shows as "dev.mydomain.com/index.htm"

My provider accepted it but... the only response I'm having when I go to dev.mydomain.com is:

Node.ACS
 
The app does not exist.

Summarizing: myapptest.cloudapp.appcelerator.com works, dev.mydomain.com (which is CNAMEd to myapptest.cloudapp.appcelerator.com) don't.