Invalid Report Source

[gundu]

Hi,
i am using vb.net 2003 & crystal reports 9 for development of the Report application,i was trying to open a report (previously designed in CR9) programatically using the CRAXDDRT object model.the following code which i wrote is throwing 'invalid reprot source'

The code is
'I took CRAXDDRT as the reference for the RDC9
dim myapp as New CRAXDDRT.Application
dim myReport as new CRAXDDRT.Report
myreport=myapp.openReport(".......Path" along with Report",))
crystalreportviewer1.Reportsource=myreport
crystalreportviewer1.show()

..Please help me in get me the solution

Gundu