query performance to increase

hi i'm using cte's as defined and took a temp table to take the columns from temp table.now,when i'm executing this logic of sp..its taking 7min for 3lakhs records. can any one pls help me how to improve my query performance..

the code which i'm using is:

create temtable as
(
cols
);
WITH Datematrix(AllocationDate)/*cte*/
	As
	(
		SELECT @StartDate AS AllocationDate
		UNION ALL
		SELECT DATEADD(D,1,AllocationDate) AS AllocationDate
		FROM Datematrix WHERE AllocationDate<@EndDate
	)
	,
/*cte*/
	Allocation (Division,DivisionID,ResourceName,ResourceEmailID,ResourceID,Project
				,ProjectID,Scope,ScopeID,WorkItem,TaskStartDate,TaskEndDate
				,ProgramID ,Program,PortfolioID ,Portfolio,StatusID,Status,TaskID,EstimateHrs,ScopeEstimateHrs)
	AS
	(
		SELECT 
			DIV.Division
		   ,RES.DivisionID
		   ,RES.ResourceName
		   ,ResourceEmailID =  STUFF((
								SELECT COALESCE( ', ' + CONVERT(VARCHAR,RES.Email1), '') 
								FROM	dbo.TasksResource TSKRES WITH(NOLOCK) LEFT OUTER JOIN 
										dbo.tb_Resource RES WITH(NOLOCK) ON RES.UID = TSKRES.ResourceID		
								 WHERE TSKRES.TaskID = TSK.TaskID 
								FOR XML PATH('')), 1, 1, '')
		   ,RES.UID ResourceID
		   ,PRJ.Project  + ' (' + CONVERT(VARCHAR(15),PRJ.StartDate,101) +' - ' + CONVERT(VARCHAR(15),PRJ.EndDate,101) + ')' as Project
		   ,PRJ.UID ProjectID
		   ,SCP.Title Scope
		   ,SCP.ScopeID
		   ,TSK.Title WorkItem
		   ,TSK.StartDate TaskStartDate
		   ,TSK.EndDate TaskEndDate
		   ,PRJ.ProgramID
		   ,PR.Program
		   ,PR.PortfolioID
		   ,PF.Portfolio
		   ,TSK.StatusID 
		   ,ST.Status
		   ,TSK.TaskID	
	       ,TSK.EstimateHrs
	       ,(isnull(SCP.EstimateARCH,0) + isnull(SCP.EstimateBA,0) + isnull(SCP.EstimateDev,0) + isnull(SCP.EstimatePM,0) + isnull(SCP.EstimateQA,0) + isnull(SCP.EstimateRM,0)) as ScopeEstimateHrs
	       --SCP.EstimateARCH + SCP.EstimateBA +SCP.EstimateDev +SCP.EstimatePM +SCP.EstimateQA +SCP.EstimateRM as ScopeEstimateHrs              
		   FROM Tasks TSK WITH(NOLOCK)
		   INNER JOIN dbo.Scope SCP WITH(NOLOCK) ON TSK.ScopeID = SCP.ScopeID
		   INNER JOIN dbo.tb_Project PRJ  WITH(NOLOCK)ON TSK.ProjectID = PRJ.UID 		   
		   INNER JOIN dbo.tb_Program PR WITH(NOLOCK) ON PR.UID=PRJ.ProgramID 	
		   INNER JOIN dbo.tb_Portfolio PF WITH(NOLOCK)ON PF.UID=PR.PortfolioID 	
		   LEFT OUTER JOIN dbo.TasksResource TSKRES WITH(NOLOCK)ON TSKRES.TaskID = TSK.TaskID 	 
		   LEFT OUTER JOIN dbo.tb_Resource RES WITH(NOLOCK) ON RES.UID = TSKRES.ResourceID	   	  
		   LEFT JOIN dbo.tb_Division DIV WITH(NOLOCK) ON RES.DivisionID = DIV.UID 
		   LEFT JOIN dbo.tb_Status ST WITH(NOLOCK) ON TSK.StatusID=ST.UID                        /*relating with the high level work items */
			WHERE (PRJ.UID = @Project OR @Project = -1)
			  AND (PRJ.ProgramID = @Program OR @Program = -1)
			  AND (PRJ.PortfolioID =@Portfolio OR @Portfolio = -1)
	) 
	,/*columns used in 2 cte's are taken in below maindata*/
	MainData (AllocationDate,Division,DivisionID,ResourceName,ResourceEmailID,ResourceID,Project,ProjectID
			,Scope,ScopeID,WorkItem,TaskStartDate,TaskEndDate
			,ProgramID ,Program,PortfolioID ,Portfolio,StatusID,Status,TaskID,EstimateHrs,ScopeEstimateHrs,Allocated)		   	
	AS
	(	SELECT 
			Datematrix.* 
			,Allocation.*
			,CASE WHEN ISDATE(TaskStartDate)=1 THEN 1 ELSE 0 END AS Allocated		
		FROM Datematrix FULL OUTER JOIN	Allocation
			ON	(	Datematrix.AllocationDate>= Allocation.TaskStartDate 
					AND Datematrix.AllocationDate<=Allocation.TaskEndDate
				)
INSERT INTO #TempTable
	SELECT * FROM MainData
	OPTION (MAXRECURSION 0);
this way the code goes...
please help.. i need my query to be tuned..!!
thanks in advance..

lucky