(Urgent) Update Statement Takes For Ever To Excecute

Hi, i am trying to Update some records in my table but the update statement is taking for ever ...this is my update Statements

 UPDATE
Statements..ParticipantFundBalances
SET
Act1 = ACT_ID1,
TotAct1 = TOT_ACT1,
Act2 = ACT_ID2,
TotAct2 = TOT_ACT2,
Act3 = ACT_ID3,
TotAct3 = TOT_ACT3,
Act4 = ACT_ID4,
TotAct4 = TOT_ACT4,
Act5 = ACT_ID5,
TotAct5 = TOT_ACT5,
Act6 = ACT_ID6,
TotAct6 = TOT_ACT6,
Act7 = ACT_ID7,
TotAct7 = TOT_ACT7,
Act8 = ACT_ID8,
TotAct8 = TOT_ACT8,
Act9 = ACT_ID9,
TotAct9 = TOT_ACT9,
Act10 = ACT_ID10,
TotAct10 = TOT_ACT10,
Act11 = ACT_ID11,
TotAct11 = TOT_ACT11,
Act12 = ACT_ID12,
TotAct12 = TOT_ACT12,
Act13 = ACT_ID13,
TotAct13 = TOT_ACT13,
Act14 = ACT_ID14,
TotAct14 = TOT_ACT14,
Act15 = ACT_ID15,
TotAct15 = TOT_ACT15,
Act16 = ACT_ID16,
TotAct16 = TOT_ACT16,
Act17 = ACT_ID17,
TotAct17 = TOT_ACT17,
Act18 = ACT_ID18,
TotAct18 = TOT_ACT18,
/*Act19 = ACT_ID19,
TotAct19 = TOT_ACT19,
Act20 = ACT_ID20,
TotAct20 = TOT_ACT20, */
OpeningUnits = UNIT_OP,
OPricePerUnit = PRICE_OP,
ClosingUnits = UNIT_CL,
CPricePerUnit = PRICE_CL,
AllocationPercent = ALLOC_PER1

FROM
Statements..ParticipantFundBalances pfb
JOIN (
Select
cp.PlanId,
p.ParticipantId,
@PeriodId Period,
CASE WHEN a.FUND_ID = 'LOAN' Then 0 ELSEf.FundId END FundId,
a.ACT_ID1,
a.TOT_ACT1,
a.ACT_ID2,
a.TOT_ACT2,
a.ACT_ID3,
a.TOT_ACT3,
a.ACT_ID4,
a.TOT_ACT4,
a.ACT_ID5,
a.TOT_ACT5,
a.ACT_ID6,
a.TOT_ACT6,
a.ACT_ID7,
a.TOT_ACT7,
a.ACT_ID8,
a.TOT_ACT8,
a.ACT_ID9,
a.TOT_ACT9,
a.ACT_ID10,
a.TOT_ACT10,
a.ACT_ID11,
a.TOT_ACT11,
a.ACT_ID12,
a.TOT_ACT12,
a.ACT_ID13,
a.TOT_ACT13,
a.ACT_ID14,
a.TOT_ACT14,
a.ACT_ID15,
a.TOT_ACT15,
a.ACT_ID16,
a.TOT_ACT16,
a.ACT_ID17,
a.TOT_ACT17,
a.ACT_ID18,
a.TOT_ACT18,
/*a.ACT_ID19,
a.TOT_ACT19,
a.ACT_ID20,
a.TOT_ACT20, */
a.UNIT_OP,
a.PRICE_OP,
a.UNIT_CL,
a.PRICE_CL,
Cast(Rtrim(i.ALLOC_PER1) as decimal) as ALLOC_PER1
FROM
ASDBF a
-- Derive the unique PlanId from the Statements ClientPlan table
INNER JOIN Statements..ClientPlan cp
ON a.PLAN_NUM = cp.ClientPlanId
AND
cp.ClientId = @ClientId
-- Derive the unique ParticipantId from the Statements Participant table
INNER JOIN Statements..Participant p
ON a.PART_ID = p.PartId--Derive the unique FundID from the Statements Fund Table...Left Outer JOIN Statements..Fund f
ONa.FUND_ID = f.Cusip
OR
a.FUND_ID = f.Ticker
OR
a.FUND_ID = f.ClientFundId
-- get the allocation percent from the INVSRC
LEFT Outer JOIN INVSRC i
ONa.FUND_ID = i.INV_ID
AND
a.PLAN_NUM = i.Plan_Number
AND
a.PART_ID = i.PART_ID

WHERE
a.Import = 1
)a
ON pfb.PlanId = a.PlanId
AND
pfb.ParticipantId = a.ParticipantId
AND
pfb.PeriodId = PeriodId
AND
pfb.FundId = a.FundId

 

 

While i insert data in my table i am checking if there are any loans in the ASDBF table and if there i am inserting a 0 in the particular

i am trying to up date the with in 3 different plans in the same table..

 

any help will be appreciated.

Regards

Karen