Passing Date peramiters from VB to crystal9 into a record formula

I am passing in my VB application the report selection date into the following fields

CRXReport.FormulaFields(3).Text = (Day(txtmaxvaldt))
CRXReport.FormulaFields(4).Text = (Month(txtmaxvaldt))
CRXReport.FormulaFields(5).Text = (Year(txtmaxvaldt))

I have watched these field loads through the DEBUGER and the fields look to be loaded correctly, but when the report is executed it returns nothing but the report form.

The crystal9 record selection formula in question is
{CMINV_INV_EXTRACT.CASE_NO} like "DU*" and
{CMINV_INV_EXTRACT.SYSTEM_ORIG_CD} in ["1", "2", "3"] and
{CMINV_INV_EXTRACT.VALUATION_DT} = Date ( {@tstyyyy},{@tstmm},{@tstdd})

I load this Date info through the crystal 9 formula expert and the report loads.  I need to know what I am missing in this load process

Thanks for your help