Multiple Parameters for Stored Procedure in Reporting Services

Below is the stored procedure I am starting with:
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I would have two input parameters for a date range and an eventid and a clientid.
 
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USE [seMRM76]
GO
/****** Object:  StoredProcedure [dbo].[rptCC_Letter]    Script Date: 05/13/2008 08:50:42 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[rptCC_Letter]
(
@StartDate DateTime,
@EndDate DATETIME, 
@clientid INT 
)
AS
BEGIN
SET NOCOUNT ON;
SELECT ISNULL((a.reservation_id),'') AS resid,
ISNULL((a.[general/meeting title]),'') AS title, 
ISNULL(RTRIM(b.ContactName),'') AS contactname,
ISNULL(RTRIM(b.ContactFirstName),' ') + ' ' + ISNULL(RTRIM(b.ContactLastName),' ')  AS ClientName,
CONVERT(VARCHAR(40),GETDATE(), 107) AS TodaysDate, 
ISNULL(RTRIM(b.CompanyName),'') AS companyname,
ISNULL(RTRIM(b.Address1),'NA') AS address1,
ISNULL(RTRIM(b.City),'') + ISNULL(RTRIM(b.State),'') + ISNULL(RTRIM(b.Zip),'') AS address2,
DATENAME(weekday, a.[Meeting Start]) + ', ' + DATENAME(MONTH, a.[Meeting Start]) + SUBSTRING(CONVERT(VARCHAR(30), a.[Meeting Start], 107), 4, 20)	as meetstart,
DATENAME(weekday, a.[Meeting End]) + ', ' + DATENAME(MONTH, a.[Meeting End]) + SUBSTRING(CONVERT(VARCHAR(30), a.[Meeting End], 107), 4, 20)	as meetend,
ISNULL((a.[General/#Attending]),'') AS attending,
right(ISNULL(RTRIM(a.[Meeting Start]),''),7) + '-' + right(ISNULL(RTRIM(a.[Meeting End]),''),7) AS startendName,
right(a.[Meeting Start],7) + '-' + right(a.[Meeting End],7) AS meetstartend, 
CONVERT(char(20),a.[Meeting Start],101) AS startdate,
CONVERT(char(20),a.[Meeting End],101) AS enddate,
ISNULL ((d.Location_ID),'') AS LocID, 
ISNULL(RTRIM(d.[Location name]),'') AS locationName,
ISNULL((a.[room_id]),'') AS room, 
ISNULL((b.[phone]),'') AS phone, 
ISNULL((b.[fax]),'') AS fax, 
ISNULL((b.[email]),'') AS email, 
ISNULL((R.[meeting room]),'') AS meetingroom, 
F.CoordFName + ' ' + F.CoordLName AS Host, 
E.[EventName] AS eventname     
FROM         
Reservations A 
INNER JOIN
Client B 
ON B.ClientID = A.[general/clientid] 
LEFT JOIN 
Rooms R  
ON R.Room_id = A.Room_id 
LEFT JOIN 
Locations D 
ON D.Location_ID = R.Location_ID   
LEFT JOIN 
vw_events E 
ON E.eventid = A.[general/eventid]   
LEFT JOIN 
vw_Coordinators F 
ON F.coordinatorid = E.coordinatorid 
WHERE A.[General/ClientID] = @clientid 
AND (A.[actual start] BETWEEN @StartDate AND @EndDate) 
AND (D.[Location Name] = 'Convention Center') 
--AND A.[actual start] > getdate() 
--order by a.[Meeting Start],R.[meeting room]
 
END