Show All Sales Reps Even If There Are No Values

I know this is an easy one, but for some reason i keep gettin the wrong results.
This displays something like this :
Question_description Visit_Activity_Id SR_Name
Vacation 5 Judy Smith
Sick 2 Judy Smith
Visit 1 Tom Mathews
Training 3 Karen Williams


But i want it to show all the SR_Name's ..like this:
Question_description Visit_Activity_Id SR_Name
Vacation 5 Judy Smith
Sick 2 Judy Smith
Visit 1 Tom Mathews
Training 3 Karen Williams
NULL null Tom Jones
NULL null Kim Jones
NULL null Jon Travis


Any help will be grately appreciated! thanks!



Code Block
ALTER PROCEDURE [dbo].[PROC_RPT_SR_DAILY_ACTIVITIES]
(@Region_Key int=null, @Daily_activity_statistics_datetime datetime )
AS
BEGIN

SELECT Customer.Name as Store_Name,
Tbl_Daily_Activity_Statistics.SR_Code,
Tbl_Daily_Activity_Statistics.Territory_Code,
Tbl_Daily_Activity_Statistics.Customer_code,
Tbl_Daily_Activity_Statistics.in_progress_time,
Tbl_Daily_Activity_Statistics.completed_time,
Tbl_Daily_Activity_Statistics.Visit_Activity_Id,
Tbl_Daily_Activity_Statistics.dial_in_datetime,
Tbl_Daily_Activity_Statistics.question_code,
tbl_Questions_to_RC_Question.RC_Question_description,
Qry_Sales_Group.SR_Name, dbo.Qry_Sales_Group.Region,
Qry_Sales_Group.Region_Key,
Tbl_Daily_Activity_Statistics.Daily_activity_statistics_datetime

FROM Tbl_Daily_Activity_Statistics
INNER JOIN tbl_Questions_to_RC_Question
ON Tbl_Daily_Activity_Statistics.question_code = tbl_Questions_to_RC_Question.question_code
INNER JOIN Qry_Sales_Group
ON Tbl_Daily_Activity_Statistics.SR_Code = Qry_Sales_Group.SalesPerson_Purchaser_Code COLLATE Latin1_General_CI_AS
LEFT OUTER JOIN customer
ON dbo.Tbl_Daily_Activity_Statistics.Customer_code = dbo.customer.customer_code

WHERE Region_key=@Region_key AND Daily_activity_statistics_datetime = @Daily_activity_statistics_datetime






END