query performance to be increased..please help..

hi,

SELECT TSK.TaskID AS [SprintID]
		,TSK.Title AS [Sprint]
		,TSK.[StartDate]
		,TSK.[EndDate]
		,SRA.[ResourceID]
		,R.[ResourceName]
		,D.[UID] AS [DivisionID]
		,D.[Division]  
		,T.[UID] AS [TechnologyID]
		,T.Technology  
		,'Free On '+ CONVERT(NVARCHAR,TSK.[EndDate],103)  [FreeStatus] 
		,ISNULL(RSS.[Rating],0) [Rating]
	FROM tb_Technology T 
	,Tasks TSK INNER JOIN TasksResource SRA ON TSK.TaskID = SRA.TaskID 
	INNER JOIN tb_Resource R ON R.[UID] = SRA.[ResourceID]  AND R.IsActive = 1
	LEFT JOIN tb_ResourceSkillset RSS ON RSS.[ResourceID] = R.[UID] AND RSS.IsActive =1
	LEFT JOIN tb_Division D ON D.[UID] = R.[DivisionID] 
	WHERE TSK.EndDate >= @StartDate AND TSK.EndDate <= @EndDate AND D.IsActive = 1 AND T.IsActive = 1 
	AND D.[UID] = (CASE WHEN @DivisionID > 0 THEN @DivisionID ELSE D.[UID] END)
	AND T.[UID] = (CASE WHEN @TechnologyID > 0 THEN @TechnologyID ELSE T.[UID] END)	
UNION
	SELECT 0 AS [SprintID]
		,'' AS [Sprint]
		,CAST(GETDATE() AS DATE) AS [StartDate]
		,CAST(GETDATE() AS DATE) AS [EndDate]
		,R.[UID] AS [ResourceID]  
		,R.[ResourceName]
		,D.[UID] AS [DivisionID]
		,D.[Division]  
		,T.[UID] AS [TechnologyID]
		,T.Technology  
		,'Free' [FreeStatus]
		,ISNULL(RSS.[Rating],0) [Rating]
	FROM tb_Technology T, 
	tb_Resource R 
	LEFT JOIN tb_ResourceSkillset RSS ON RSS.[ResourceID] = R.[UID] AND RSS.IsActive = 1
	LEFT JOIN tb_Division D ON D.[UID] = R.[DivisionID] 
	WHERE R.[UID] NOT IN (SELECT SRA.ResourceID FROM TasksResource SRA)
	AND R.IsActive = 1 AND T.IsActive = 1
	AND D.[UID] = (CASE WHEN @DivisionID > 0 THEN @DivisionID ELSE D.[UID] END)	
	AND T.[UID] = (CASE WHEN @TechnologyID > 0 THEN @TechnologyID ELSE T.[UID] END)	

i'm using the above code..where my technology table has 18,900 rows and task has 109 rows.

when these 2 are cross joined i think more time taking...this query is taking much time to execute.pls help me how can i retrieve the result with less time.

total result is 3lakhs rows and running more than 7-8min..

lucky