Connection string issue in 64 bit Machine

Hi,Hannes and dataMiser
i have been using 64 bit machine . and os as well 64 bit . the following connection string is working in vb.net .

Code:

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Dim con As New OleDbConnection("Provider=OraOLEDB.Oracle;Data Source=infinity-db:1521/rptprod;User Id=MDMFIROZ;Password=MDMFIROZ_142")

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but the following connection string is not working in vb6 Application . let me know some valuable comment please .

Code:

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constr = "Provider = OraOLEDB.Oracle;Data Source=infinity-db:1521/rptprod;User Id=MDMFIROZ;Password=MDMFIROZ_142"

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