Crystal Report Problem in ASP.net

[smtwtfs007]

Any body has any idea about his error please?

I got this error at the time of creating crystal report. I tried
everything to resolve this error. But I could not. Please help.

Exception has been thrown by the target of an invocation. at
System.Reflecti on.RuntimeMetho dInfo.InternalI nvoke(Object obj,
BindingFlags invokeAttr, Binder binder, Object[] parameters,
CultureInfo culture, Boolean isBinderDefault , Assembly caller, Boolean
verifyAccess) at
System.Reflecti on.RuntimeMetho dInfo.InternalI nvoke(Object obj,
BindingFlags invokeAttr, Binder binder, Object[] parameters,
CultureInfo culture, Boolean verifyAccess) at
System.Reflecti on.RuntimeMetho dInfo.Invoke(Ob ject obj, BindingFlags
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at Microsoft.Visua lBasic.Compiler Services.LateBi nding.FastCall( Object
o, MethodBase method, ParameterInfo[] Parameters, Object[] args, Type
objType, IReflect objIReflect) at
Microsoft.Visua lBasic.Compiler Services.LateBi nding.InternalL ateCall(Object
o, Type objType, String name, Object[] args, String[] paramnames,
Boolean[] CopyBack, Boolean IgnoreReturn) at
Microsoft.Visua lBasic.Compiler Services.LateBi nding.LateCall( Object o,
Type objType, String name, Object[] args, String[] paramnames,
Boolean[] CopyBack) at
SentryDotNet.Re portComponents. ExportFunctions .ExportPDF(Stri ng
ExportFilePathN ame, Object& crReportDoc)

ExportPDF has the following code

ExportPDF(ByVal ExportFilePathN ame As String, ByRef crReportDoc As
Object)

Dim crExportOptions As ExportOptions
Dim crDiskFileDesti nationOptions As
DiskFileDestina tionOptions

'Set the options for saving the exported file to disk
crDiskFileDesti nationOptions = New
DiskFileDestina tionOptions
crDiskFileDesti nationOptions.D iskFileName =
ExportFilePathN ame
'Set the exporting information
crExportOptions = crReportDoc.Exp ortOptions
With crExportOptions
.DestinationOpt ions = crDiskFileDesti nationOptions
.ExportDestinat ionType =
ExportDestinati onType.DiskFile
.ExportFormatTy pe =
ExportFormatTyp e.PortableDocFo rmat
End With

'Export the report
crReportDoc.Exp ort()

THis has been working good. The only change I have added is including
2 new columns in XSD file and also on the report, SQL query. SQL query
is working fine and returning results.

But when I am trying to create PDF crystal report using the above
ExportPDF function. It thrown error.

Any help please?

THanks.