SQL CASE Output COUNT Into Two Columns

Hi Everyone,

 I am trying to do a query where I need to use as little C# as possible to build my gridview.  Basically I have a column called statusID.  There are about 15 options for this column but I only want to count certain ones.  I want to count when statusID = 3 and output that into a column called "fullUnitsUsed" but when the value is 4 or > 13 I want it to count and put the result into a column called "halfUnitsUsed".  I also want it to count based on the month.  To accomplish this I have used CASE and GROUP BY.  This has worked to some extent.  Currently if I COUNT for one month I get the correct number of fullUnitsUsed and halfUnitsUsed used for January.  Unfortunately the query returns 2 records for the month.  The first one has a value for fullUnitsUsed and halfUnitsUsed is NULL, the second record has fullUnitsUsed as NULL and halfUnitsUsed has the correct value.  I was hoping to output one record where both fullUnitsUsed and halfUnitsUsed have data.  My other problem is that if I test for the entire year (which is what this query is supposed to do) there are 5 records returned for each month, 3 of the records have fullUnitsUsed and halfUnitsUsed both as NULL and for the other 2, one has fullUnitsUsed with data and the other has halfUnitsUsed with data and the other column in both records is NULL.  The values for fullUnitsUsed and halfUnitsUsed are counted for the entire year as well, which I only want it to count based on each month.  Below is my query, any suggestions about how to approach this will be greatly appreciated.  If any clarification is needed please let me know.  Again if I could get this to work completely with SQL and not need to use any more C# than I have to it would be preferable.

SELECT People.lastName + ', ' + People.firstName AS fullName, Property.Name, NYSDDSORegion.Description, OpenDays.[month], OpenDays.maxOpenDays,CASE Attend.statusID

    WHEN 3 THEN COUNT(Attend.statusID)

    END AS fullUnitsUsed,CASE Attend.statusID

    WHEN 4 THEN COUNT(Attend.statusID)

    WHEN 14 THEN COUNT(Attend.statusID)

    WHEN 15 THEN COUNT(Attend.statusID)

    WHEN 16 THEN COUNT(Attend.statusID)

    WHEN 17 THEN COUNT(Attend.statusID)

    WHEN 18 THEN COUNT(Attend.statusID)

    WHEN 19 THEN COUNT(Attend.statusID)

    WHEN 20 THEN COUNT(Attend.statusID)

END AS halfUnitsUsed

FROM Attend INNER JOIN People ON Attend.personID = People.personID

                     INNER JOIN Property ON Attend.propertyID = Property.propertyID

                     INNER JOIN NYSDDSORegion ON Property.RegionID = NYSDDSORegion.RegionID

                    CROSS JOIN OpenDays

WHERE (Attend.attendDate BETWEEN '1/1/2007' AND '12/31/2007')

GROUP BY Property.Name, People.lastName, NYSDDSORegion.Description, People.firstName, OpenDays.monthID, OpenDays.[month], OpenDays.maxOpenDays, Attend.statusID

ORDER BY Property.Name, fullName, NYSDDSORegion.Description