For example, your code looks like:
My.Computer.Network.UploadFile ( _
"C:\My Documents\Order.txt", _
"http://www.cohowinery.com/uploads.aspx")
But, the "uploads.aspx" is very specific in how data is received yet you provide no details. In other examples I've seen you specify "upload.aspx" yet still talk about "uploads.aspx".
There are thousands of other examples in the VB world alone where you copy and drop in code only to be frustrated by the example not working.