Passing Excel values to a SQL Server 2012 view

I am using Excel 2010 to invoke a SQL view to populate a table into Sheet1.  The parameter values are in cells B1 and B2.

The following is the view code I am using:

SELECT     CASE WHEN AttendProviderID IS NOT NULL THEN AttendProviderID ELSE CASE WHEN PrimCareProviderID IS NOT NULL
                      THEN PrimCareProviderID ELSE CASE WHEN AdmitProviderID IS NOT NULL THEN AdmitProviderID ELSE CASE WHEN ErProviderID IS NOT NULL
                      THEN ErProviderID ELSE CASE WHEN FamilyProviderID IS NOT NULL THEN FamilyProviderID ELSE '' END END END END END AS ProvID,
                      dbo.BarVisits.VisitID, dbo.BarVisits.AccountNumber, CASE WHEN dbo.BarVisits.DischargeDateTime IS NULL
                      THEN dbo.BarVisits.ServiceDateTime ELSE dbo.BarVisits.DischargeDateTime END AS DisDt, CASE WHEN dbo.BarVisits.AdmitDateTime IS NULL
                      THEN dbo.BarVisits.ServiceDateTime ELSE dbo.BarVisits.AdmitDateTime END AS AdmDt, dbo.BarVisits.InpatientOrOutpatient,
                      dbo.BarVisits.InpatientServiceID, dbo.AbsConsultations.ConsultProviderID, dbo.AbsConsultations.ConsultSeqID
FROM         dbo.BarVisitFinancialData2 RIGHT OUTER JOIN
                      dbo.AbsConsultations RIGHT OUTER JOIN
                      dbo.BarVisits ON dbo.AbsConsultations.VisitID = dbo.BarVisits.VisitID ON dbo.BarVisitFinancialData2.VisitID = dbo.BarVisits.VisitID
WHERE     (CASE WHEN dbo.BarVisits.DischargeDateTime IS NULL THEN dbo.BarVisits.ServiceDateTime ELSE dbo.BarVisits.DischargeDateTime END BETWEEN
                     sheet1.range("B1").value AND sheet1.range("B2").value)

When the date parameters are hard coded, i.e 2014-10-01 and 2014-10-31, it works fine.


The where clause is not working.  Can someone look at it and let me know what I need to correct?