Daily Calculation Need Help

Hi: I am having a problem with the Syntax. I am trying to get the daily value for a contract_nbr. The selection below shows that I am selecting by Case statement when day = 2 (2nd Day) and the month is a parameter provider by the user. For this particular example, I am using 2 (February).
Thanks for the help !!!!


[code]
Set @Req_Month = '2'

SELECT Distinct a.contract_nbr,
Case when Day(c.Beg_eff_date) = 2 and month(c.Beg_eff_date)= @Req_Month
Then c.rcpt_nom_vol-c.rcpt_fuel-rcpt_act_vol
Else 0
End As Day_2
from TIES_Gathering.dbo.contract a
Inner Join TIES_Gathering.dbo.NOm b on a.contract_nbr = b.contract_nbr
Inner Join TIES_Gathering.dbo.Nom_vol_detail c on c.Nom_id = b.Nom_id
where (a.contract_sub_type = 'INT') and (a.Contract_type_code ='GTH')
and (DATEADD(mm, DATEDIFF(mm,0,getdate()), 0) < a.current_expirtn_date)
and (c.rcpt_dlvry_ind ='R')
Group by a.contract_nbr
[code]