WebMethod and DataSet parameter - Help me.

[Mauricio Pires]

I have a web application that calls a webservice's method which has a typed
dataset parameter that is filled by it.
The web application calls the web method passing a dataset parameter, the
dataset is filled, but when the execution returns to the web application the
dataset is empty.
Why is the dataset empty?

The webmtehod looks like:

<WebMethod()> Public Sub LoadDataSet(ByRef ds as dataset)
'load the dataset
....
End Sub

Note: If I call a web function that returns a dataset , it works ok.