Plesk 11.x / Windows :: Adding Second MySQL Server

I have a dedicated server and I am about to get a few high traffic sites that will be Joomla based and MySQL served. What I am thinking a about is to create another MySQL instance, leave the current websites on the "old" instance and get the new ones onto a separate instance.

I am on PPP 11.0.9 on windows and the current mysql version is 5.1.56 on port 3306 (I can get other ports for other instances).

What I did was the following:

In the Database Servers page, I hit "Add Database Server"

In the next page I add the following:
MySQL (from the dropdown)
localhost
3307
(leave blank the default check box)

I then add the Administrator's username and passwords and hit OK.

The next page, reports an error message (in between asterisks below):
************************
Error: Test connection to the database server has failed because of network problems:

No connection could be made because the target machine actively refused it.
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The primary (eg. current) mysql instance is working fine, it's just I cannot add a second server...