Step 1 - Make Sure Your Season/League Is Set Up Correctly

You must first have at least one season with at least one league and teams in it.  That league must have a regular season to auto schedule.  To set the regular season dates of a league go to the Leagues/Groups Page and click on the league you want to edit.  Also from this page set the Season Length of this league.
There are two ways of setting the Season Length...
     1) Setting the number of Games Per Team
     2) Setting the number of times Teams Play Each Other.
Finally on this page you can set the minimum Time Between Games(per team) and the Default Game Duration.

Step 2 - Set Playing Area Availability

You have to set up the availability of your playing areas.  If you haven't created any Playing Areas go to the Playing Areas Page  and click Add Area .  
There are two parts of setting an areas availability... 
     1) Setting open times of the area
     2) Specifying the leagues that are available to play on this area
Area open times are used to mark a playing area as open at certain times on days of the week(ex. Sun 9:00am to 7:00pm).  Click on Edit Availability on the Playing Areas page.  This will bring up the availability page for this area.   Click on Add Open Time and add the times the area is open on the days of the week.  If this changes during the course of the season enter both of the times separately checking Time Period at the bottom(ex. Mon 5:00pm to 9:00pm Jan 1 to Feb 1 - Mon 4:00pm to 8:00pm Feb 2 - March 30). 
League availability is the league(s) that are available to play on a playing area.  Click on Edit League Availability at the bottom of the Playing Areas page and check off the leagues that are eligible to play on this area.  You can have multiple leagues eligible to play on the same area or a league eligible to play on multiple areas.

Step 3 - Set League Open Times

You have set up the open times of your areas and specified what leagues are eligible to play on those areas.  Now you have to set up the League Open Times.
League Open Times are used to mark a league as open on a certain playing area at certain times on days of the week(ex. Sun 9:00am to 7:00pm on Field 1).  A league open time must be within the open time of the area for that day(ex. Sun 11:00am to 3:00pm) and it must be for an area the league is eligible to play on.  To set the League Open Timesclick on the Auto Scheduling Page and click on League Open Times.  Click Add Open Time and add the open time for that league.  A league can not have an open time on an area it is not eligible to play on or for a time slot that the area is not open.

Step 4 - Create An Auto Schedule

Now that you have set up the Area Open Times, League Availibility and League Open Times you can automatically create the schedule for a league.  Go to the Auto Scheduling Page and click on Auto Scheduling Wizard.  From here you will have a last chance to change certain parameters such as Season Length, Time Between Games(per team), and the Default Game Duration.  You will also be able to view the list of Open Time Slots and Team Pairings .  Click Update And Auto Schedule and the schedule will automatically be created.  If you want to change something and recreate the automatic schedule click Delete Schedule.  Otherwise click Accept Schedule.  If you want to see an analysis of the schedule before you accept it click Schedule Analysis.  If you need to make any changes to the automatically created schedule go to the Schedules/Scores Page and edit the games you need to.