Orderby in VB.NET

Hi!

I need to retrieve all events in my calendar ordered by startime. All
events are recurring events, and I want to retrieve single events
ordered. I send a query like this:

Dim feedURL as Uri = New
Uri("http://www.google.com/calendar/feeds/default/private/full?orderby=starttime&sortorder=ascending&singleevents=true&max-results=500";)

Dim myQuery as EventQuery = New EventQuery
myQuery.Uri = feedURL
Dim myFeed As EventFeed = myService.query(myQuery)


I retrieve all single events correctly, but with random order
(everytime I run my program, the order is different!).

How can I make it? Anyone has solve it? What am I doing wrong?

Thanks in advance.