Stored procedure execution problem

Question

hi guys
I am having problems running a stored procedure where i am using two input parameters
my stored procedure is as follows
ALTER procedure [dbo].[enterdhbnameDhbService]
@dhb_service char, @dhbname char
as
SELECT dbo.DHBMappingTable.[DHB Name], dbo.Agency.DHB_service, dbo.PurchaseUnitMappingTable.PU,
SUM(dbo.[NMDS Data for IDF Report].[Number of caseweighted discharges]) AS Expr1, dbo.AdmissionMappingTable.Admission
FROM dbo.DomicileCodes INNER JOIN
dbo.[NMDS Data for IDF Report] ON dbo.DomicileCodes.[Domicile code] = dbo.[NMDS Data for IDF Report].[Domicile Code] INNER JOIN
dbo.PurchaseUnitMappingTable ON dbo.[NMDS Data for IDF Report].[Purchase Unit] = dbo.PurchaseUnitMappingTable.PU INNER JOIN
dbo.AdmissionMappingTable ON
dbo.[NMDS Data for IDF Report].[Admission Type Description] = dbo.AdmissionMappingTable.[Admission Type Description] INNER JOIN
dbo.Agency ON dbo.[NMDS Data for IDF Report].[Agency Name] = dbo.Agency.Agengy INNER JOIN
dbo.DHBMappingTable ON dbo.DomicileCodes.[DHB area] = dbo.DHBMappingTable.[DHB Code]
WHERE (dbo.[NMDS Data for IDF Report].[Financial Year] = '20062007')
GROUP BY dbo.DHBMappingTable.[DHB Name], dbo.Agency.DHB_service, dbo.PurchaseUnitMappingTable.PU, dbo.AdmissionMappingTable.Admission
HAVING (dbo.Agency.DHB_service = @dhb_service) and
AND (dbo.DHBMappingTable.[DHB Name] = @dhbname )
The values of  " @dhb_service" and "@dhbname" need to be entered when the stored procedure is executed. Now when I execute the stored procedure through the following statement:
exec enterdhbnameDhbService
@dhb_service = 'canterbury' ,@dhbname = 'south canterbury'
SQL does not give me any results, only empty table gets displayed. I have checked the combination.. This combination does exist in my table
pls help guys

Answer 1

Increase the size of the stored procedure parameters as "mitasid" suggested.
Remove HAVING clause,
SELECT dbo.DHBMappingTable.[DHB Name], dbo.Agency.DHB_service, dbo.PurchaseUnitMappingTable.PU,
SUM(dbo.[NMDS Data for IDF Report].[Number of caseweighted discharges]) AS Expr1, dbo.AdmissionMappingTable.Admission
FROM dbo.DomicileCodes INNER JOIN dbo.[NMDS Data for IDF Report]
ON dbo.DomicileCodes.[Domicile code] = dbo.[NMDS Data for IDF Report].[Domicile Code]
INNER JOIN dbo.PurchaseUnitMappingTable
ON dbo.[NMDS Data for IDF Report].[Purchase Unit] = dbo.PurchaseUnitMappingTable.PU
INNER JOIN dbo.AdmissionMappingTable
ON dbo.[NMDS Data for IDF Report].[Admission Type Description] = dbo.AdmissionMappingTable.[Admission Type Description]
INNER JOIN dbo.Agency
ON dbo.[NMDS Data for IDF Report].[Agency Name] = dbo.Agency.Agengy
INNER JOIN dbo.DHBMappingTable
ON dbo.DomicileCodes.[DHB area] = dbo.DHBMappingTable.[DHB Code]
WHERE
dbo.[NMDS Data for IDF Report].[Financial Year] = '20062007'
AND (dbo.Agency.DHB_service = @dhb_service)
AND (dbo.DHBMappingTable.[DHB Name] = @dhbname)   
GROUP BY
dbo.DHBMappingTable.[DHB Name],
dbo.Agency.DHB_service,
dbo.PurchaseUnitMappingTable.PU,
dbo.AdmissionMappingTable.Admission
Regards, RSingh