From the installation guides:

Quote
Create Admin Login

Before you can log into the control panel you must first create your Administrator login. Look for the line above the login box that says "Please set up your admin profile by clicking here." Click on the "click here" link. Fill in all of the data fields and click the submit button. Review your profile and make any changes needed.  Once you have finished setting up this profile, close that browser window to return to the control panel.

Enter the username and password for the administrator you just created and click the "Submit Identification Now" button. Welcome to your new control panel.
Step 11 on Windows, step 13 on Unix. The link should appear on your control panel log in page.

-jlb