missing or out of date export dll plzzzzzz help

i have installed crystal report on development machine and tring to export in vb application as pdf..i get missing or out of date dll when i use

Report.ExportOptions.ApplicationFileName = App.Path & "\Email\" & tmbox.Text & ".pdf"
Report.ExportOptions.DestinationType = crEDTApplication
Report.ExportOptions.DiskFileName = App.Path & "\Email\" & tmbox.Text & ".pdf"
Report.ExportOptions.PDFExportAllPages = True
Report.ExportOptions.FormatType = crEFTPortableDocFormat
Report.Export (False)

howver if i use some other code like prompting user to specify locaiton to save it it works fine..can any one tell me the problem..i m using crystal report 9 with vb 6

EVEN in the software if i use export it gives me failed to export error