SSRS Reports With Oracle DB--some One Plz Help Me.

Hi Guys,
I am creating SSRS report using Oracle DB. When i run this query in TOAD, it's giving output but when i run this in SSRS to create new dataset then it is giving me ORA -01008:not all variables bound(Microsoft OLE DB provider for Oracle).

This is the query iam running.

SELECT ts.transaction_status_desc, COUNT (ut.transaction_id) AS transcount
FROM dsc_transaction_status_vl ts,
dsc_user_transaction ut,
billing_markets bm,
retail_location rl,
cash_register cr
WHERE ts.transaction_status = ut.transaction_status
AND ut.cr_number = cr.cr_number
AND cr.rl_number = rl.rl_number
AND ut.RL_NUMBER = rl.RL_NUMBER
AND rl.bm_code = bm.bm_code
AND (ut.creation_date BETWEEN tartDate AND :EndDate)
AND bm.bm_name IN
(CASE (:Market)
WHEN 'OKC' THEN ('OKLAHOMA CITY' || 'TULSA')
WHEN 'NFL' THEN ( 'DAYTONA'|| 'JACKSONVILL' || 'MELBOURNE'|| 'NORTH FLORIDA'|| 'ORLANDO' || 'WEST FLORIDA' )
WHEN 'LA' THEN ('PAC Los Angeles')
WHEN 'CAR' THEN ('Carolinas')
END
)

I am passing 3 parameters: StartDate, EndDate and Market.
we have 3 markets and each market includes some cities. Cities are in BM_NAME column.
My Question is that
1) How to pass parameters for Oracle using SSRS
2) How to resolve this error: ORA -01008:not all variables bound(Microsoft OLE DB provider for Oracle)
3)How can i write Stored Procedure for this query & How to execute SP in SSRS.

Please reply me. Thanks in advance.

Thanks
Santosh