Using Date Ranges in SQL Server 2005

I am having a problem with a query I am writing and would like to see if you guys could help out some? I have two integer fields with the same name in two different tables that I am trying to sum to get the total volume in a specified date range and my query is returning the worng results and I cannot figure out what is wrong. This is the query I am using:
(date is the primary key in both tables)

SELECT Sum(BOSS) AS TotalVolInRange
FROM Keyed_Data AS A INNER JOIN Stored_Vol_Counts AS B
ON A.Date = B.Date
WHERE A.Date >='2012-09-09' and <'2012-09-15' AND B.Date >= '2012-09-09' and <'2012-09-15'AND A.DisplayAsID = 35 AND B.DisplayAsID = 35;

I have also used this to no avail:

SELECT Sum(BOSS) AS TotalVolInRange
FROM Keyed_Data AS A INNER JOIN Stored_Vol_Counts AS B
ON A.Date = B.Date
WHERE A.Date between '2012-09-09' and '2012-09-15' AND B.Date between '2012-09-09' and '2012-09-15'AND A.DisplayAsID = 35 AND B.DisplayAsID = 35;

And this:

SELECT Sum(BOSS) AS TotalVolInRange
FROM Keyed_Data AS A INNER JOIN Stored_Vol_Counts AS B
ON A.Date = B.Date
WHERE A.Date between '09/09/12' and '09/15/12' AND B.Date between '09/09/12' and '09/15/12' AND A.DisplayAsID = 35 AND B.DisplayAsID = 35;

Any help would be greatly appreciated.This is the first time I have posted a question but use the site often as a reference :)

Thanks in advance,
BrianS.

Tags: SQL Server 2005, SQL Server, DateTime