Can't Get At First Row Of Input Buffer...why?!

Hi

A script component receives some input. But I just can't get at the first row??

Basically, if i use the NextRow method in the in the Do statement, then it advances the row collection to the second row before it gets into the code inside the loop?? BUT, if I use the EndOfRowset property to define my loop then I get an error:

[PipelineBuffer has encountered an invalid row index value]

I'm guessing this means...I have to call NextRow before i access the data in the collection? But thats retarted because then I miss the first row?? what? What am I missing??

This is the code which works but I miss the first row:

Public Overrides Sub Input0_ProcessInputRow(ByVal Row As Input0Buffer)
Dim strConcept As String

Do While Row.NextRow()


strConcept = Row.concept

updateDb(strConcept)

Loop
End Sub

This is the code which throws the invalid row index error:

Public Overrides Sub Input0_ProcessInputRow(ByVal Row As Input0Buffer)
Dim strConcept As String

Do While Not Row.EndOfRowSet()


strConcept = Row.concept

updateDb(strConcept)

Row.NextRow()

Loop
End Sub

I've put some try catches in there an the error happens on the line which calls Row.concept....?

Can anyone help, it must be something I'm messing up

thanks!!

andy