setting up the tracking sub domains with Google Analytics

Initially I started with a single domain. Installed the GA module in Drupal, got my account setup with Google, and all was working as it should in regards to GA.

I then split my site into sub domains.

mydomain.com - now just for launching to the sub domains
1.mydomain.com
2.mydomain.com
3.mydomain.com

Am having problems setting up yhr tracking my sub domains with GA.

I currently have 4 separate sites/Drupal installations/databases.
Each installation has the GA module installed with the same UA number as mydomain.com.

Per another issue that I was looking at I've plugged a snippet into the GA module in mydomain.com that is supposed to allow the sub domains to be tracked.

This is what I've plugged into custom javascript area of mydomain.com:
pageTracker._setDomainName("mydomain.com.com");

Is this correct and if so what about my sub domains. Should I have the GA module running in those and if so should I use the same UA number that I do in mydomain.com.

I've goofed with different profiles in my account on the Google Analytics page. For example if your create profiles it assigns different dash (i,e., -2, -3, -4) numbers to the same UA number. Plugged these new dash numbers into the GA modules for each subdomain.

I've also tried setting up multiple accounts for each sub domain with unique UA numbers. Plugged these unique new UA numbers into the GA modules for each sub domain.

None of this seems to work.

Any help anyone could offer would be appreciated.